Answer:
skin.
Explanation:
the first line of defense uses physical parts such as skin.
In perspective, with Earth being 4,500,000,000 years old and humans being around 1,400,000 years; how long out of a 24 day time period have we as humans been here.
Answer:
Day time period have we as humans been here: 26 seconds
Explanation:
4,500,000,000 years = 1 day
1,400,000 years = X
X = 0.0003111
1 day = 86,400 seconds
0.0003111 = X
X = 26 seconds
In term of the Earth in 24-hour clock, Homo sapiens appeared on our planet only in the last 26 seconds, it means that in geologic time, humans have existed for only a brief time period and thereby it is a relatively new species.
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
Which bests describes a pilus
Answer:
A tube that extends from a bacterium
Explanation: A tube that extends from a bacterium
Answer:
A tube that extends from a bacterium
Explanation:
Clarissa complained of shortness of breath and currently has a pacemaker. A myocardial perfusion imaging, tomographic (SPECT), multiple studies, was done. What is the appropriate CPT code for this procedure?
a. 78452
b. 78451
c. 78453
d. 78456
Answer:
a. 78452
Explanation:
Myocardial perfusion imaging is use to assess myocardial viability or to determine the extent of myocardial ischemia. SPECT systems is widely using now a days as imaging can be done in less than 10 minutes.
The appropriate CPT code for the procedure that Clarissa is undergoing is 78452. 78452 include multiple studies at stress or rest condition by providing injection of radionuclide in resting phase before taking resting images. This code also determine radioactivity distribution counts arising from certain areas such as anterior wall counts may be reduced.
Hence, the correct option is a. 78452
Explain the plasma membrane in easy way.
Answer:
The cell membrane (also known as the plasma membrane (PM) or cytoplasmic membrane, and historically referred to as the plasmalemma) is a biological membrane that separates the interior of all cells from the outside environment (the extracellular space) which protects the cell from its environment.[1][2] The cell membrane consists of a lipid bilayer, including cholesterols (a lipid component) that sit between phospholipids to maintain their fluidity at various temperatures. The membrane also contains membrane proteins, including integral proteins that go across the membrane serving as membrane transporters, and peripheral proteins that loosely attach to the outer (peripheral) side of the cell membrane, acting as enzymes shaping the cell.[3] The cell membrane controls the movement of substances in and out of cells and organelles. In this way, it is selectively permeable to ions and organic molecules.[4] In addition, cell membranes are involved in a variety of cellular processes such as cell adhesion, ion conductivity and cell signalling and serve as the attachment surface for several extracellular structures, including the cell wall, the carbohydrate layer called the glycocalyx, and the intracellular network of protein fibers called the cytoskeleton. In the field of synthetic biology, cell membranes can be artificially reassembled.[
Explanation:
What is the role of the pancreas
Answer:
It converts food you consume into body fuel for our cells.
Answer:
It produces digestive enzymes
Explanation:
Just took the quiz
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:
(e) Predict the effect of the removal of the final electron acceptor on the rate of carbon fixation by the chloroplast. Justify your prediction
Answer:
The ATPs produced during Chemeiosmosis, in the chloroplast is needed during Calvin cycle to fix carbon for production of CHO, protein and fats during conversion of 3C-glyceride phosphate(GP) to 2C- triose phosphate.(TP) .
The ATPs is needed for this reduction to take place in the presence of NADPH(which is oxdized to NADP).
Therefore, if the final electron acceptor is removed, there will be no electron transport chains which generated the PMF, for pumping H+ across into the thylakoid membrane of the chloroplast, to generate the electrochemical gradients, needed for the energy for ATPase synthase enzymes,to synthesize ATPs production.
Therefore, the removal of the electron acceptor (oxygen) leads to stoppage of electron transport chain, and hence loss of ATP s, and therefore, no Carbon fixation as CHO, or protein, or fats.
Explanation:
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.
Different plants need different fertilizers .for example ,roses need a fertilizer with lots of potassium in it.Which fertilizer would you recommend a rose grower to use from above mentioned?
Answer:
A rose grower should use Muriate of potash, Potassium sulfate, Potassium nitrate, Sulfate potash magnesia, Kainite etc.
Brian's eighth grade biology class is conducting a scientific investigation to find out what types of rock the school is built on. The class goes out to collect rocks from an exposure at the edge of the school property. Which scientific process is the class involved in when they do this
Answer:
Gathering evidence.
Explanation:
Scientific evidence refers to the information obtained by research or observation.t This is the root of the scientific method because it's how an investigator evaluates different ideas, theories, or hypotheses. The mechanism of science involves explaining the phenomena we see in the world that match the data one has collected for the purpose. If one's theory doesn't match the evidence, then it needs to be revised. Therefore collecting evidence is a significant part of scientific investigation.
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
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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please send me labeled scorpion
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.
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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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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Which corrections should be made to describe photosynthesis accurately? Check all that apply.
(1) Light energy and chemical energy should be switched.
(1) Chemical energy should be changed to mechanical energy.
(3) Plants that contain chlorophyll should not be included.
(3) Oxygen should be changed to carbon dioxide.
(4) Animals and plants should be switched.
Answer:
Light energy and chemical energy should be switched.
Plants that contain chlorophyll should not be included.
Animals and plants should be switched.
Explanation:
We have that for the Question,it can be said that the corrections which should be made to describe photosynthesis accurately will have it at the end defined as
Photosynthesis Is a process an phenomenon where plants possessing chlorophyll and uses sunlight water and carbon dioxide to produce chemical energy.
From the question we are told
Which corrections should be made to describe photosynthesis accurately? Check all that apply.
(1) Light energy and chemical energy should be switched.
(1) Chemical energy should be changed to mechanical energy.
(3) Plants that contain chlorophyll should not be included.
(3) Oxygen should be changed to carbon dioxide.
Generally
The correct definition of photosynthesis is
Photosynthesis Is a process an phenomenon where plants possessing chlorophyll and uses sunlight water and carbon dioxide to produce chemical energy.
Therefore
The corrections which should be made to describe photosynthesis accurately will have it at the end defined as
Photosynthesis Is a process an phenomenon where plants possessing chlorophyll and uses sunlight water and carbon dioxide to produce chemical energy.
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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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Albumin is a protein that is found in eggs.
Which of the following describes the structure of albumin?
Choose 1 answer:
A molecule containing carbon, hydrogen, and oxygen in a 1:2:1 ratio
B
A chain of amino acids folded and twisted into a molecule
Three fatty acids attached to one glycerol molecule
D
A series of nitrogenous bases attached to a sugar-phosphate backbone
Answer:
B
Explanation:
Proteins are organic compounds containing carbon, hydrogen, oxygen, and nitrogen. Amino acids are compounds that consist of an R group, carboxylic acid end, and amino end. A chain of amino acids is referred to as a protein.
The statement 'a chain of amino acids folded and twisted into a molecule' describes the structure of albumin (Option B).
Proteins are macromolecules composed of a long sequential chain of amino acids linked together by peptide bonds.All proteins must be twisted and folded by a cellular mechanism called protein folding, which becomes an inactive polypeptide chain into a functionally active protein.Protein folding modifies the tridimensional (3D) conformation of a protein in order to become it into a biologically active molecule that performs specific functions (e.g., an enzyme with catalytic functions).In conclusion, the statement 'a chain of amino acids folded and twisted into a molecule' describes the structure of albumin (Option B).
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In the lab on Trophic Interactions you were looking at behavior of mosquito larvae. The question being asked was: Does prey behavior change in the presence of a predator? What would be an appropriate null hypothesis for this experiment? Recall in Treatments 2 and 3, a predator was added to the mosquito tanks.
Answer:
Null hypothesis: the behavior of mosquito larvae doesn't change in the presence/absence of predators added to the tanks in Treatments 2 and 3.
Explanation:
In statistics, the null hypothesis states that there are no differences between the two variables tested in the experiment, while the alternative hypothesis uses the experimental data in order to reject the null hypothesis. In this case, the alternative hypothesis will use the data from treatments 2 and 3 to confirm that predators can modify the behavior of mosquito larvae.
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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How was the present-day theory of evolution developed?
Answer:
The theory of evolution by natural selection, first formulated in Darwin's book "On the Origin of Species" in 1859, is the process by which organisms change over time as a result of changes in heritable physical or behavioral traits.
Explanation:
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
True r false- Hurricane storm categories increase as wind increases and pressure decreases.
Answer: False
Explanation: I think it's false because, hurricane damages are caused by storm surges, strong winds and associated tornadoes.
Which is the biggest disadvantage of using unipotent cells for medical
treatments?
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.
Many traits (phenotypes), like eye color, are controlled by multiple genes. If eye color were controlled by the number of genes indicated below, how many possible genotype combinations would there be in the following scenarios?
a. 5 Genes:
b. 10 Genes:
c. 20 Genes:
Answer:
Explanation:
If there are 5 genes, let us assume that they are in the alternative forms with 2 possible gets for each five... So we have
2 possible gametes for each five = 2 to the power of 5 = 32 gametes
Then genotypes = 3 to the power of 5 = 243
The same also for 10 genes
2 possible gametes for each 10 = 2 to the power of 10 = 1024 gametes
Then genotypes = 3 to the power of 10 = 59,049
The same also for 20 genes
2 possible gametes for each 20 = 2 to the power of 20= 1,048,576
Them genotypes = 3 to the power of 20 = 3,486,784,401
Many traits (phenotypes), like eye color, are controlled by multiple genes. In the following scenario, the number of genes are:
a. 5 Genes: 243 genes
b. 10 Genes: 59,049 genes
c. 20 Genes: 3,486,784,401 genes
What are genes?Genes are small hereditary materials bound in tiny beads like fashion and make a chromosome.
Now, the number of genes in the given scenario is:
a. 5 Genes: If there are 5 genes, let us assume that they are in the alternative forms, with 2 possible gets for each five.
So, 2 possible gametes for each five = 2 to the power of 5 = 32 gametes
The genotypes combinations = 3 to the power of 5 = 243
b. 10 Genes: 2 possible gametes for each 10 = 2 to the power of 10 = 1024 gametes
The genotypes combinations = 3 to the power of 10 = 59,049
c. 20 Genes: 2 possible gametes for each 20 = 2 to the power of 20 = 1,048,576
The genotypes combinations = 3 to the power of 20 = 3,486,784,401
Therefore, the number of genes is:
a. 5 Genes: 243 genes
b. 10 Genes: 59,049 genes
c. 20 Genes: 3,486,784,401 genes
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To determine if the substance in the first test tube
above is indeed a meat, you could also test it
using
Answer:
Biuret solution
Explanation:Just did the lab
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