Answer:
Explanation:
A. To produce all purple flowers from a cross between purple and white flowers, it means the parents genotype are dominant homozygous purple and the recessive homozygous white ( PP and pp)
B. The F1 generation will possess a phenotype of purple colour with genotype ( Pp )- heterozygous
C. Organisms with two copies of the same allele are called homozygotes
D. Organisms with two different alleles are called heterozygotes
2. When is it necessary to perform a test cross?
This test is only perform when the identity/genotype of one of the parents is unknown then a testcross is carried out.
3.A The coat color of the female he must use is white...a testcross is done with the recessive parents
B. The genotype of the male brown rabbit is Bb to produce a white rabbit.
4. The law of independent assortment amd meiosis relates in that the independent assortment law talks about independent separatíon of gens from each other and in meiosis, it takes into account the independent separation of homologous chromosomes.
5. The law of segregation of genes takes into account that an individual that is diploid possessing 2 copies of a gene/alleles on each homologous chromosome, that each of these alleles segregation or separate into each gametes, as one allele per gamete.
5. Non-Mendelian inheritance includes all listed below
6.
1. When a gene has more than two allele variants - multiple alleles
2. When a single gene or allele controls the expression of 2 or more traits - Pleitropy e.g. as in the ABO blood group
3. When offspring show a blended phenotype, a physical appearance intermediate to the phenotype of both parents: incomplete dominance
4. When an allele is carried in the X chromosome - X linked inheritance
Answer: the biological
Explanation: the biological
The goal of applied behavior analysis is to __________.
Answer:
To establish and enhance socially important behaviors.
Explanation:
This is a form of therapy that helps individuals improve on certain important behaviors which affects our daily life. We are likely to socialize and it’s imperative to have the necessarily social skills or behavior.These behaviors include punctuality,social, communication and learning skills etc.
The main aim of applied behavior analysis is to establish and enhance socially important behaviors.
In tomatoes, dwarf (d) is recessive to tall (D), and opaque (light-green) leaves (op) are recessive to green leaves (Op). The loci that determine height and leaf color are linked and separated by a distance of 7 m.u. For each of the following crosses, determine the phenotypes and proportions of progeny produced.
A. D Op/ d op*d op/d op
B. D op/ d Op*d op/d op
C. D Op/d op*D Op/op d op
D. D op/d Op*D op/d Op
Answer:
a). D Op / d op X d op / d op –Parents
as we know,
Distance (m.u.) = Recombination frequency (%)
D Op / d op genotype produces 4 types of gametes as below:
Recombinant gametes (7%):
D op = 3.5% , d Op= 3.5%
Non-recombinant gametes (93%):
D Op= 46.5% , d OP =46.5%
Genotype, d op / dop produces only one type of gametes, d op.
d op
D OP (46.5%) D OP/d op (46.5%) = Tall, green
D op (3.5%) D op/d op (3.5%) = Tall, opaque
d OP (3.5%) d OP/d op (3.5%)= Dwarf, green
d op (46.5%) d op/d op (46.5%) = Dwarf, opaque
b). similarily D op / d Op X d op / d op –Parents
Distance (m.u.) = Recombination frequency (%)
D op / d Op genotype produces 4 types of gametes similarily as in case a,
Genotype, d op / dop produces only one type of gametes, d op.
d op
D OP (3.5%) D OP/d op (3.5%) = Tall, green
D op (46.5%) D op/d op (46.5%) = Tall, opaque
d OP (46.5%) d OP/d op (46.5%)= Dwarf, green
d op (3.5%) d op/d op (3.5%) = Dwarf, opaque
c). D Op / d op X D Op / d op -----Parents
D Op / d op genotype produces 4 types of gametes as below:
Recombinant gametes (7%):
D op = 3.5% = 0.035 , d Op= 3.5%=0.035
Non-recombinant gametes (93%):
D Op= 46.5%=0.465 , d OP =46.5%=0.465
The table is attached for C.
d). D op / d Op X D op / d Op –Parents
Distance (m.u.) = Recombination frequency (%)
siliarily as a, b, and c gametes are four with the same frequency and table for the answer is attached
Recombinant gametes (7%):
D op = 3.5% = 0.035 , d Op= 3.5%=0.035
Non-recombinant gametes (93%):
D Op= 46.5%=0.465 , d OP =46.5%=0.465
Humus represents _____ of the soil composition to 5% b) 60% c) 25% d) 15% e) 50%
Answer:
The correct answer is B, 60%
Explanation:
Humus, which ranges in color from brown to black, consists of about 60 percent carbon, 6 percent nitrogen, and smaller amounts of phosphorus and sulfur
It has been stated that the rainforests owe their existence at least in part to bats.
Is this a valid statement and why or why not? Defend your answer.
Answer: Valid Statement ✓
Explanation:
Bats have been known to contribute to the growth and restoration of Tropical Rainforests in 2 main ways. Seed Dispersal and Pollination.
Seed Dispersal.
Fruit Bats in the Tropical Rainforest are responsible for a lot of seed dispersal. Feeding at night to avoid predators, they eat fruits from various trees and then defecate these seeds after digestion. Fruit Bats like most other bats are very strong fliers and so cover a whole lot of distance at night meaning that they give the seeds a very wide coverage. Indeed it has been shown that because they defecate the seeds, the seed already has fertilizer to get nutrients from as it grows thereby increasing it's growth rate.
There are also trees and plants that have evolved to grow spiky or sticky fruit that attach themselves to the Bats which then deposit them elsewhere as they fly.
Pollination.
Fruit Bats have specialized long tongues to sip nectar from flowers. When they do this they pollinate the flowers. It has even been shown that some plants evolved to have brighter colours so as to attract these bats to enable pollination to happen. Indeed research shows that more than 125 genera of tropical plants rely on bats for pollination.
Bats plays an essential role in the existence of rainforests, they help to replenish and expand the area of rainforests.
The importance of bats:Bats plays an essential function in the existence of rainforests. Along with the birds they assist in some of the major activities like replenishing the devastated region and expanding the region of rainforests. It is known that the majority of the tropical plants are dependent upon the methods of seed dispersal for expansion of rainforests.
Apart from this, restoration of rainforests is also dependent upon the fruit-consuming animals like bats. Bats helps to disperse the shrub species to the gradually regenerating barren landscapes or grasslands or rainforests, which got devastated. It has been found that about 90 percent of the pollination and dispersal of seeds in rainforests is done with the help of species like bats.
The bats can assist in regenerating the deforested areas in short span of time in comparison to any modern strategies. Therefore, bats helps in afforestation of rainforests. Due to their aerial nature, they possesses the tendency to cover wide region and plays significant role in dispersal and pollination.
Thus, bats are essential for the existence of rainforests.
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In this lecture you learned that due to ___________descent, organisms share many of the same genes and proteins. However, distantly related organisms have _______ DNA differences than closely related organisms.
Answer:
evolutionary
more
Explanation:
In this lecture you learned that due to evolutionary descent, organisms share many of the same genes and proteins. However, distantly related organisms have more DNA differences than closely related organisms.
Organic evolution general refers to the descents, with modification, of organisms from common ancestors. Hence, organisms that share the same ancestors share several similar genes and proteins due to their common lineage. The closer the organisms, the more similar their genes and proteins, and the distant the organisms, the more dissimilar their genes.
Examination of a sandstone outcrop reveals an abundance of feldspar and quartz grains. Could this weathered material have come from a nearby basaltic lava flow or a granite outcrop up the road?
The weathered material of a sandstone outcrop revealing an abundance of feldspar and quartz grains would have come from a granite outcrop up the road rather than a nearby basaltic lava flow.
Feldspar is a common mineral found in granite, whereas it is less abundant or absent in basaltic lava flows. Granite is composed primarily of feldspar along with quartz and other minerals. So, the presence of an abundance of feldspar grains suggests a connection to granite rather than basalt.
Quartz is present in both granite and basalt, but it is more commonly associated with granite. Quartz is one of the major constituents of granite, whereas it is generally less abundant in basaltic lava flows. Therefore, the presence of quartz grains does not necessarily differentiate between the two sources but aligns more with the possibility of granite as the origin.
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A paramount scientific finding by Mark Rosenzweig found that, compared to control rodents, rodents raised in enriched environments had:
a. increased cortical mass, increased numbers of neurons, increased synaptic connections, increased neurotransmitter amounts, and increased myelination.
b. increased cortical mass, increased numbers of neurons but decreased synaptic connections, decreased neurotransmitter amounts, and decreased myelination.
c. decreased cortical mass, decreased numbers of neurons yet increased synaptic connections, increased neurotransmitter amounts, and increased myelination.
d. decreased cortical mass, decreased numbers of neurons, decreased synaptic connections, decreased neurotransmitter amounts, and decreased myelination.
Answer:
The correct option is a. "increased cortical mass, increased numbers of neurons, increased synaptic connections, increased neurotransmitter amounts, and increased myelination. "
Explanation:
Rodents that have been raised in enriched environments were found to have thicker cerebral cortex containing approximately 25% more synapses in a study conducted by Mark Richard Rosenzweig. This increase in synapses implies in an increase in neurons and neurotransmitters, which also indicates an increase in myelination.
3. How do genes control the functioning of cells and our characteristics?
Answer:
A gene is a short section of DNA. your genes contain instructions that tell your cells to make molecules called protein
Answer:
Basically gene produces a functional product such as a protein which regulates the functioning of our cells via carrying out different processess.
Explanation:
Genes are short segments of our DNA that code for functional products such as proteins. Proteins basically do everything in your cells and your phenotype (what you look like and how you cells behave) everything is controlled by these functional products that a gene makes.
Which of the following body parts has striped muscles?
Answer:
Heart
Explanation:
A young man who works on a ranch and lives in the log bunkhouse experiences sudden fever with muscle aches. A few days later he begins to cough and have difficulty breathing, and goes to an urgent care clinic. His blood pressure is low. A blood sample reveals a low platelet count. A Gram stain of a sputum sample shows only a few small bacteria present. Which of the following is the most likely infecting agent?
A) Bacillus anthracis
B) Hantavirus
C) Histoplasma capsulatum
D) influenza
E) Mycoplasma pneumonia
Answer:
The correct answer is: B) Hantavirus.
Explanation:
Hantavirus is an infectious disease caused by a family of viruses that exist in rodents such as rats. These viruses can either cause Hantavirus Pulmonary Syndrome (HPS), especially in the Americas; or Hemorrhagic Fever with Renal Syndrome (HFRS), which is most common in Europe and Asia.
The young man described has symptoms that match the common symptoms of Hantavirus Pulmonary Syndrome, such as fever and muscle aches (known as the 'early symptoms'), as also coughing and having difficulty breathing (known as the 'late symptoms'). Some of these symptoms can easily be confused with Influenza, but the shortness of breath and the fact that the patient has a history of working and living in a rural environment suggest Hantavirus.
HPS also produces a low platelet count and high white cell count.
Infection by Bacillus anthracis is uncommon, plus the lack of symptoms that match the disease (such as a sore throat) and the existence of muscle aches in the patient (which does not match Anthrax) can help discard this option.
Histoplasma capsulatum is a fungus that can cause lung infection when its spores are inhaled. Its symptoms are similar to HPS but with the addition of red bumps in the legs and joint pain, not muscle aches.
Mycoplasma pneumonia is a bacteria that produces pneumonia. Most of its symptoms match the patient except for the lack of a sore throat.
Which statement about enzymes is true?
An enzyme functions to increase the activation energy in a reacton.
Enzymes are proteins that function as catalysts in nonliving things.
Each enzyme can catalyze many different biochemical reactions.
Enzymes and substrates fit together like a lock and key.
Answer:
Enzymes and substrates fit together like a lock and key since, in one enzymatic reaction, only the correct substrate (i.e., the key) binds to its corresponding enzyme (i.e. the lock).
Explanation:
An enzyme (or catalyst) is one protein that has catalytic functions, being therefore capable of accelerating chemical reactions. The enzymes are known to control the rate of these chemical reactions (i.e., catalysis) without suffering alterations during these processes. Thus, the enzymes are proteins that catalyze chemical reactions that are not favored under normal conditions. Moreover, one enzyme may catalyze more than one chemical transformation, as well as the same reaction may be catalyzed by two or more enzymes.
Explain how substitution, insertion, and deletion mutations are similar and different from one another.
Substitution:
Substitution is the switch of codons. A C could be switched to an A, but the original is now substituted for the new codon. This can change the amino acid present or it can be a silent mutation. If the stop codon is switched in, the protein will be cut short and the effects could be very serious.
Insertion:
Insertion is where base pairs are inserted into the DNA. This is different from substitution because nothing is getting switched out, just new ones are getting inserted. The original codons will still be present, just new ones are coming in. Insertions result in a frame-shift, which means everything after the mutation is shifted and nothing will be correct after this. Insertions are more harmful than substitution because it doesn't affect just one amino acid, but many.
Deletion:
Deletion is where some codons or DNA is deleted. This will result in everything after the mutation being incorrect and can cause drastic effects. Deletion is very similar to insertion because they both cause a frame-shift, but also very different because they do the opposite from one another. Deletion is also more harmful than substitution because of the frame-shift and the change in future amino acids.
Eating disorders are caused by all of the following factors EXCEPT:
A. psychological factors
B. genetic factors
C. economic class
D. financial factors
Please select the best answer from the choices provided.
Ο Α
О В
О С
OD
Answer:
C
Explanation:
Eating disorders are caused by all of the following factors except economic class. Thus, option C is correct.
What is Eating disorders?Eating disorders could have the serious, or the life-threatening consequences. As the result, it has been critical to seek the treatment for these conditions. Before the doctor can treat an eating disorder, the condition that must be diagnosed. Some people may deny that there has the problem.
Disordered eating has been refers to the variety of the irregular eating behaviors that may or may not warrant the diagnosis of an eating disorder. Eating disorders, such as the anorexia nervosa (AN) and bulimia nervosa (BN), are the diagnosed disease using specific and narrow criteria.
Therefore, Eating disorders are caused by all of the following factors except economic class. Thus, option C is correct.
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A scientist discovers a cell that has chloroplasts, cytoplasm, DNA, and a cell membrane. Which statement best describes how
the cell could be classified?
Answer: The cell is eukaryotic because it has chloroplasts. A scientist is studying a cell and can clearly see that it has ribosomes and mitochondria.
Explanation:
Answer:
The cell is eukaryotic because it has chloroplasts. A scientist is studying a cell and can clearly see that it has ribosomes and mitochondria.
Explanation:
Just took the test 2020
A channel protein specific for calcium ions was found to have a pore lined with six glutamate residues that participate in coordinating the calcium ion. What would happen to the selectivity of the pore if the Glu residues were mutated to Asp residues
Answer:
If the mutation takes place, then the shorter side chains of asp compare to Glu will affect the permeability of the transport protein to calcium ions. Specifically, the mutation will increase the sizes of the pore,which in turn decreases the selectivity for calcium ion. Hence this affect excitability of the cell.
Explanation:
Following Dietary Guidelines
According to the Dietary Guidelines for Americans, which foods should you increase and decrease within your diet?
Sort each food into the appropriate category
Foods to Increase
Foods to Decrease
bacon
salty snacks
salmon
wheat bread
vegetables
sugary drinks
Pls help. I’ll give you brainiest
Answer:
Foods to Increase:
- salmon
- wheat bread
- vegetables
Foods to Decrease:
- bacon
- salty snacks
- sugary drinks
Explanation:
I don't really know how to explain the answers, hope that helped anyway : )
Lana was walking down the sidewalk looking at her phone and didn't notice the curb ahead. As she tripped her ankle turned inward (inversion). She heard a pop and had pain on the lateral side (outside) of her ankle and foot. Lana went to urgent care and was diagnosed with a 2nd degree lateral ankle sprain and fracture of her fibula (lateral bone in the lower leg). List all the types of tissues that have been affected by this injury. Which will likely heal slower, ligament or bone?
Answer:
ligament bcos ligament heal before bone
A ligament tear is an injury caused by an extreme motion, like a forceful twisting of a joint. A tear usually causes immediate pain and perhaps even a "pop" sound at the site of injury when it occurs. Depending on the severity of the injury, the affected site may become unstable.
What is Ligament?Ligaments are elastic bands of tissue that connect bones to each other and provide stability and strength to the joint. The four main ligaments in the knee connect the femur (thighbone) to the tibia (shin bone) and include the following: Anterior cruciate ligament (ACL).
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Samples of the octapeptide AVGWRVKS are subjected to proteolytic cleavage by either trypsin or chymotrypsin. Select the most appropriate technique for separating the digestion products of AVGWRVKS if cleaved by trypsin. salting out gel‑filtration chromatography dialysis ion‑exchange chromatography Select the most appropriate technique for separating the digestion products of AVGWRVKS if cleaved by chymotrypsin.
A. dialysis
B. gel‑filtration chromatography
C. ion‑exchange chromatography
D. salting out
Answer:
If cleaved by trypsin you will need to do gel-filtration, if cleaved by chymotrypsin you will need to do ion-exchange.
Explanation:
ASAP PLEASE HELPP
In a DNA strand with the sequence of C-G-G-T-A-G, the letters represent different...
A.) Monosaccharides
B.) Amino Acids
C.) Nitrogenous Bases
D.) Fatty Acids.
Answer:
C) nitrogenous bases
I think its C since the rest are types of molecules bigger than DNA
Difference between striated muscle, smooth muscle and cardiac muscle.
Answer:
Cardiac and skeletal muscle are both striated in appearance, while smooth muscle is not. Both cardiac and smooth muscle are involuntary while skeletal muscle is voluntary. ... While skeletal muscles are arranged in regular, parallel bundles, cardiac muscle connects at branching, irregular angles, called intercalated discs. interenet lol
Explanation:
Answer:
Striated muscles are the muscles that allow your body to move. Smooth muscles are the ones in the digestive system that allow food to move along the gut. I'm not sure about the Cardiac muscle.. I think it's something to do with the heart.
Explanation:
Hope this helps :) Please comment if it helped..
Someone pls help me to understand what the lock and key theory is for how enzymes work. (use diagrams if it helps)
Answer:
according to this theory both enzymes and substrate possess specific shapes that fit exactly into one another.This model explains specificity.
general example when we open the door of our house we use a specific key to open the door not all keys will open the door of our house.In this example the key is substrate and the door or lock is the enzyme that fits into specific substrate.
Which characteristic proves Lactobacillus acidophilus is from the specific kingdom Eubacteria?
Answer: It has peptidoglycan
Explanation:
The kingdom Eubacteria is the domain of prokaryotic bacteria. These are unicellular and prokaryotic organisms. Their cell membrane is made up of lipids. The cell wall is made up of peptiodoglycan which gives rigidity to the cell wall. It gives the structural strength to the bacterial cell wall, gives the strength to the bacteria, and it will counteract the osmotic pressure develop in the cytoplasm.
Lactobacillus acidophilus possess the peptidoglycan in the cell wall this establishes its relationship with kingdom Eubacteria.
both ethanol and glycine are small molecules of approximately equal molecular weight. However, ethanol is much more membrane permeable than glycine. What accounts for the large difference in membrane permeability between ethanol and glycine
Answer:
Ethanol is a non polar molecule.Therefore it passes through the cells membrane easily by diffusion like other non polar like CO2 and water.However, glycine is an amino acid ( the simplest amino acid) a charged molecule /polar molecule/.it can not therefore pass through the bilayer by simple diffusion because of the phospholipid bi-layers. Therefore special transport proteins are needed for its passage across the cell membrane.
Example-GLYT 1 and 2 are the carrier proteins specific for glycine transport across the membrane.
G
Explanation:
What is the difference between Palm trees and mosses ?
A- Palm trees have leaves , while mosses do not.
B- Palm trees are large , but mosses are small.
C- Palm trees have roots and mosses do not.
D- Palm trees produce flowers while mosses do not.
Answer:
Palm trees produce flowers whiles masses do not
Question 17
Cancer is a disease in which some cells lose their ability
to control which of the following?
A
size
B
sister chromatids
C
rate of division
D
surface area
Answer:
rate of division
Explanation:
In normal cells, the cell cycle is controlled by a complex series of signaling pathways by which a cell grows, replicates its DNA and divides. In cancer, as a result of genetic mutations, this regulatory process malfunctions, resulting in uncontrolled cell proliferation.
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PLEASE MARK IT TH BRAINLIEST!
Cancer is a disease in which some cells lose their ability to control rate of division. The correct option is C.
What is cancer?Cancer is the body's unchecked proliferation of aberrant cells. When the body's natural control system malfunctions, cancer might emerge.
Instead of dying, old cells proliferate uncontrollably to produce new, aberrant cells. These excess cells could aggregate into a tissue mass known as a tumour.
Genes, the fundamental building blocks of inheritance, can change in ways that result in cancer.
Chromosomes are long, tightly packed DNA strands where genes are organised. Since genes that determine how our cells behave, particularly how they grow and divide, are altered, cancer is a genetic disease.
Thus, the correct option is C.
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Help me ! Please man I need help !!
Which is a lymphocyte?
O A. Amylase
Ο Ο
B. Macrophage
O C. Urethra
D. B cell
Answer:
Lymphocyte is a B cell ans - option DHow N-formylmethionine (fMet) is only associated with the 5' AUG initiation codon and not with internal AUG codons, given that methionine in both cases in encoded by an AUG in the mRNA.
Answer:
Different transfer RNAs (tRNAs) selectively bind to N-terminal and internal AUG codons of bacterial polypeptides .
Explanation:
In prokaryotic organisms, N-formylmethionine (fMet) is coded by the start codon (AUG), thereby generating the most N-terminal residue of bacterial proteins. This residue (fMet) is a modified methionine amino acid that contains attached a formyl group to its amino group. Remarkably, it has been shown that formylmethionyl-tRNA only can bind to this initial AUG codon, while methionyl-tRNA binds to internal AUG codons.
The image to the left shows Earth's major plates. A
geologist is studying a plate boundary indicated by the
arrow
Fill in the blank to complete the statement about the
plate boundary
This boundary is between the African Plate and the
Plate
Answer:
Its Eurasian
Explanation:
This boundary is between the African Plate and the Eurasian Plate.
This boundary is known as a convergent plate boundary. Convergent plate boundaries occur when two tectonic plates move toward each other.
In the case of the African Plate and the Eurasian Plate, they are colliding, and one plate is being forced beneath the other in a process called subduction.
As the plates converge, the intense pressure and friction cause seismic activity, leading to earthquakes and volcanic eruptions in the region.
These collisions also result in the formation of mountain ranges, such as the Himalayas, as the crust is pushed upward and folded.
Studying this convergent plate boundary is essential for understanding the geological processes shaping our planet's surface and the associated hazards like earthquakes and volcanoes.
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Place the following generation of action potential steps in order:
1) sodium channels are inactivated.
2) voltage-regulated potassium channels open and potassium moves out of the cell, initiating repolarization.
3) sodium channels regain their normal properties.
4) a graded depolarization brings an area of excitable membrane to the threshold.
5) a temporary hyperpolarization occurs.
6) sodium channel activation occurs.7) sodium ions enter the cell and further depolarization occurs.
Answer: 6) sodium channel activation occurs.
4)a graded depolarization brings an area of excitable membrane to the threshold.
7) sodium ions enter the cell and further depolarization occurs.
1)sodium channels are inactivated.
2) voltage-regulated potassium channels open and potassium moves out of the cell, initiating repolarization.
3) sodium channels regain their normal properties.
5) a temporary hyperpolarization occurs
Explanation:
action potential occurs when the differences in the concentrations of ions on opposite sides of a cellular membrane lead to a voltage of a specific cell location rapidly rises and falls.
The steps involved in this generation are;
First of all the sodium-gated channel activation occurs due to inflow of Na, this is called depolarization. A graded depolarization brings an area of excitable membrane to the threshold. More sodium ions enter the cell and further depolarization occurs. After which the sodium channels are inactivated due to the opening of voltage-regulated potassium channels and potassium moves out of the cell, returning it to it initial resting phase initiating repolarization. sodium channels regain their normal properties. a temporary hyperpolarization occurs which is a transient negative shift after an action potential occurs.
What are compounds called that form H+ ions when dissolved in water?
Answer:
Acid
At the simplest definition, an acid is any compound that yields hydrogen ions (H +) or hydronium ions (H 3O +) when dissolved in water. Hydronium ions are really the combination of H + ions and H 2O molecules
Explanation: