Answer:
The lips begin to form. I know that during the second trimester ears and eyes begin to develop, so I assume that lips would also begin to develop too.
In pregnancy, during the second-trimester blood pumps through the heart. The correct option is A.
What is trimester?A pregnancy is divided according to the weeks namely trimesters, these are first trimester, second trimester, and third trimester.
A trimester usually occurs between 12 and 14 weeks and a full-term pregnancy occurs at around 40 weeks.
In pregnancy, during the second-trimester blood pumps through the heart.
Thus, the correct option is A.
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Which macromolecule is made up of nucleic acids ?
A. Sucrose
B. RNA
C. Fatty Acids
D. Protein
Answer:
Ribonucleic acid (RNA)
Explanation:
DNA (deoxyribonucleic corrosive) is the most widely recognized type of hereditary material found in numerous living beings.
Nucleic acids connect the two strands of the DNA double helix together.
RNA (ribonucleic corrosive) is additionally found as genetic material (and not DNA) in certain creatures like infections.
Infections could have ssRNA (single-stranded RNA) or dsRNA (double-stranded RNA) as their hereditary material.
However, RNA is generally single-stranded, in contrast to DNA, which is double-stranded consistently.
Another type of RNA is messenger RNA (mRNA), ribosomal RNA (rRNA), transfer RNA (tRNA), etc
Where in the body does a mutation have to occur in order to cause an inherited change in the offspring?
Answer
This has to be in germinal cells./germ-line cells.That is in the sex cells of either sperms or the eggs. it may occur during Gametogensis.
The fusions of these sex cells resulted in a new organism.Where the genes inherited in the two sex cells are fully expressed,It is duding the expression that the effect of the mutation will be shown.
Explanation:
How many groups are in the modem periodic table
Answer:
The correct answer is
18
Groups of the periodic table: The s-, p-, and d-block elements of the periodic table are arranged into 18 numbered columns, or groups.
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Some fish have bony fins. If the body of water they are in dries out, these fins can be used to help the fish "walk" to another body of water. In this context, bony fins are an example of ________. A) an exaptation B) an adaptation C) a macroevolutionary event D) pedomorphosis
Answer:
A) an exaptation
Explanation:
name two ways that veins and arteries are different
Answer: blood travels from the heart through arteries and blood travels to the heart through the veins.
I hope this helps
H
Br
H
Br
H
Br
Br
H
What best describes these two molecules?
They are not isomers.
They are structural isomers.
They are geometric isomers.
They are both structural and geometric isomers.
Answer:
It's C
Explanation:
They are geometric isomers. Thus option C is the correct answer.
what is isomers ?Two chemical species with the same number and types of atoms but different configuration are called as isomers, the spontaneous process by which isomers are formed called isomerization.
This process is independent of bond energy of the configurations.
Different types of isomers are structural isomers, geometric isomers, stereoisomers, optical isomers.
The major type called structural Isomers where atoms and functional groups are differently joined with each other. For example, 1-fluoropropane and 2-fluoropropane positional change.
Another types is stereoisomers formed between atoms and functional groups with differential geometrical positioning.
This class include enantiomers which are non-superimposable mirror images of each other and have chiral centers. example are D-threose and D-erythrose.
In stereoisomers, the class of diastereomers have different physical properties and reactivities.
Thus option C is the correct answer.
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Which of the following does not use the sun's energy in any way?
A. Wind
B. Geothermal
C. Biomass
D. Coal
After a volcanic eruption, lava flows on the surface of the Earth. After the lava has time to cool, scientists notice that plants are starting to grow on the lava surface. What kind of ecological process could you infer is happening and why?
Answer:
The correct answer is ecological succession.
Explanation:
For the growth and development of an ecosystem, the phenomenon of ecological succession plays an essential role. A slow procedure by which the ecosystems modify and develop with time is termed as the ecological succession. There are prime two kinds of succession, that is, primary succession and secondary succession.
The phenomenon of ecological succession helps in the colonization of the novel areas, and in the recolonization of the destructed ecosystems, this helps the species to get amend with the modifications taking place in the surroundings and helps them to thrive. The given case is an illustration of ecological succession as the flowing of lava creates barren land, which further helps in the establishment of the pioneer plants. These pioneer species of plants helps in the development of a new ecosystem.
Identify whether flexion or extension is occurring in the following situations:
1. Intervertebral foramen gets smaller
2. Anterior longitudinal ligament becomes taut .
3. Anterior annulus bulges slightly Spinous processes approximate
4. Facet joints compress
5. Posterior annulus becomes taut
6. Space for nerve roots gets larger
7. Superior vertebral body translates anteriorly
Answer:
Explanation:
1. Intervertebral foramen gets smaller - Extension
2. Anterior longitudinal ligament becomes taut - Flexion
3. Anterior annulus bulges slightly Spinous processes approximate - Flexion
4. Facet joints compress - Extension
5. Posterior annulus becomes taut - Extension
6. Space for nerve roots gets larger - extension
7. Superior vertebral body translates anteriorly - flexion
Which of the following is not a cause of water pollution?
a jet fuel
b laundry soap
c ammonia
d none of the above
Answer:
D) none of the above
Explanation:
took the quiz on edgenudity
The right answer is (a) jet fuel.
What is water pollution?Water pollution refers to the presence or introduction of harmful substances or pollutants into bodies of water such as lakes, rivers, oceans, and groundwater.
These pollutants can come from a variety of sources, including natural and human-made sources. While there are many different types of pollutants that can cause water pollution, some of the most common sources of water pollution include:
Industrial waste: Industries and factories release a variety of pollutants into water bodies, such as chemicals, heavy metals, and organic compounds.
Agricultural runoff: Fertilizers and pesticides used in agriculture can leach into waterways and cause significant pollution. Agricultural runoff can also contain soil, animal waste, and other contaminants that can degrade water quality.
Sewage and wastewater: Sewage and wastewater from homes and businesses contain a wide range of pollutants, including human waste, chemicals, and pharmaceuticals. These pollutants can have serious impacts on aquatic life and human health.
A jet fuel is not typically a cause of water pollution. While spills of jet fuel or other petroleum products can occur and can cause significant harm to aquatic ecosystems, they are not one of the most common causes of water pollution.
The most common causes of water pollution include things like industrial waste, agricultural runoff, sewage and wastewater, and improper disposal of household chemicals and medications.
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g B. PROTEINS 1. Name the gastric enzyme that initiates protein digestion. Explain how this enzyme is activated. Pepsin is the gastric enzyme that initiates protein digestion. It is activated by stomach acid into the active form. It then breaks down the protein in our food into smaller particles like peptide fragments and amino acids. 2. Name the ducts in the pathway by which pancreatic juice flows from the pancreas to the duodenum. The Pancreatic duct. 3. Describe 3 ways the body uses these amino acids..
Answer:
1-the gastric enzyme is pepsin, which is why it is a peptidase, since it catalyzes the binding of proteins within the stomach. Its activation method is the acidic pH of the stomach.
2-Pancreatic juice is a juice that hydrolyzes and helps the digestion of proteins or peptides, since this is the EXOCRINE substance of the pancreas, this juice being exocrine is poured into the main pancreatic duct of the pancreas and then through the choledochol in the blister of toilet at intestinal level.
3-amino acids are used by the body for hormonal, transport, and structural purposes. It also has other functions such as the conformation of the same DNA, but there are 3 that must be answered.
Explanation:
Proteins have structures or junctions that are quaternary, tertiary, binary, and primary.
the easiest to degrade with the quaternary and tertiary while the other two do not.
It is important that you know this fact why these structures are ordered from the outside to the inside or inside the protein, the outermost ones are the quaternary ones and the innermost ones are the primary ones.
A protein ceases to be protein and becomes free and separated amino acids when it reaches the heart of the protein and breaks the primary bond, or the sea the strongest and most difficult to break.
These amino acids have multiple functions but they can be said which, when united, are the unit that makes up proteins or peptides.
The only part of the earths inner structure that is a liquid is the
Answer:
The answer would be the outer core
Explanation:
15. How are mitochondria similar to prokaryotic cells?
Answer:
Mitochondria have their own cell membranes, just like a prokaryotic cell does. Each mitochondria has its own circular DNA genome.
Explanation:
Evolution is change in a population over time and includes the gene pools of that population. How does biogeographic isolation allow for the change of gene pools over time
OPTIONS:
A) biogeographic isolation affects the random changes that take place within gene pools
B) biogeographic isolation affects the changes in gene pools that result from which organisms are breeding
C) biogeographic isolation determines who will win competition for mates
D) biogeographic isolation determines the time that populations will breed
Answer:
A) biogeographic isolation affects the random changes that take place within gene pools
Explanation:
Organisms can become splitted and isolated from each other by biogeographical factors, thereby preventing the isolated population of species from interbreeding with each other. When this occurs, the isolated population, over time, evolve separately and later become distinct from each other leading to a change in the original gene pool.
Biogeographical factors uch as habitat isolation can cause a change in the original gene of a species population which have now become isolated geographically, and thus, evolve separately.
Complete the following sentences about heme by moving the terms to the correct targets Some terms will not be used.
1. The prosthetic group of hemoglobin and myoglobin is_______.
2. The organic ring component of heme is_______
3. Under normal conditions, the central atom of heme is________.
4. In________the central iron atom is displaced 0.4 A out of the plane of the porphyrin ring system.
5. The central iron atom has_______bonds:________to nitrogen atoms in the porphyrin, one to a_______residue and one to oxygen.
A. Oxyhemoglobin
B. Six
C. Four
D. Three
E. Histidine
F. Heme
G. Serine
H. Fe2+
I. Deoxyhemoglobin
J. Cysteine
K. Fe3+
L. Porphyrin
Answer:
1. The prosthetic group of hemoglobin and myoglobin is heme.
2.The organic ring component of heme is porphyrin ring.
3. Under normal conditions, the central atom of heme is Iron (Fe2+).
4. In deoxyhaemoglobin the central iron atom is displaced 0.4 A out of the plane of the porphyrin ring system.
5.The central iron atom has six bonds: four to nitrogen atoms in the porphyrin, one to a histidine residue and one to oxygen.
Explanation:
1. The heme is the prosthetic group common to both the hemoglobin and myoglobin. It is made up of a central iron ring.
2. The porphyrin ring is the organic component of the heme that surrounds the iron ring. Its based on a tetrapyrole ring called porphin commonly found in other biomolecules such as cytochrome and chlorophyll in plants
3. Iron (Fe2+) is central to the heme structure. It has the ability to bind to an oxygen molecule at a time. This gives the protein- hemoglobin the ability to bind to 4 oxygen molecules at a time.
4. Deoxyhaemoglobin is simply a reduced form of hemoglobin which has lost oxygen molecule in red blood cells. It is purple blue in colour.
5. In the middle of the porphyrin ring, the iron binds to 4 nitrogen atoms. 2 free binding sites are available on either side of the plane heme structure with histidine surounding the heme molecule.
Which statement describes a feature of equal are projection?
Option C
Latitude lines meet at the poles.
Explanation:
Several equivalent projections were developed in an attempt to minimize the distortion of countries and continents of planet Earth,keeping the area constant.
hope it helps
Answer:
c
Explanation:
i did it already
Name a serious disease caused by protozoa
Answer:
African sleeping sickness is caused by protozoa in the Trypanosoma genus. These organisms are carried by the tsetse fly and transmitted to humans via tsetse fly bites. According to the World Health Organization, Trypanosoma brucei gambiense causes more than 90 percent of African sleeping sickness cases.
73 The messenger RNA sequence that codes for the amino acid chain
TYR-ARG-GLY-VAL-ALA-LEU is
(1) UAU-CGA-GUU-UUU-UUA-CUC
O (2) UAU-CGA-GGA-GUU-GCG-CUC
O (3) CUC-GCG-GUU-GGA-CGA-UAU
O (4) CUC-UUA-UUU-GUU-CGA-UAU
Answer:
(2) UAU-CGA-GGA-GUU-GCG-CUC
Explanation:
The mRNA is produced by the process of transcription which transcribes the DNA to mRNA which can be recognised and read by the ribosomes.
The ribosomal subunits get attached to the mRNA which scans or read the mRNA in the form of codons or triplets of nucleotides. These codons code for particular amino acid and about 64 codons code for 21 amino acids.
In the given question, the sequence of the amino acids in the peptide has been provided based on which the sequence of codons can be easily decoded.
For the provided peptide, the sequence of amino acid will be Option-2 which is UAU-CGA-GGA-GUU-GCG-CUC as this sequence of codons has the codons arranged according to the sequence of the amino acid.
Thus, Option-2 is the correct answer.
UAU-CGA-GGA-GUU-GCG-CUC is the sequence code that encodes the mRNA TYR-ARG-GLY-VAL-ALA-LEU
A codon table is usually employed in translating the genetic code into amino acid sequencesmRNA plays a major role in protein synthesis which originate from the joining together of individual amino acids in the ribosomes.
These amino acids are encoded by three letters that form a codon. There are 64 different codons in the genetic code encoding for the entire 20 amino acids.
The amino acid chain is thus decoded as:
TYR - UAUARG - CGAGLY - GGAVAL - GUUALA - GCGLEU - CUCTo learn more about the genetic code see the link: https://brainly.com/question/21272924?referrer=searchResults
What is the function of the seed coat ?
• it protects the new plant.
• it contains food.
• it performs respiration.
• it attracts animals.
Answer:
It protects the new plant.
Female honey bees are diploid and male honey bees are haploid. The haploid males produce sperm and can successfully mate with diploid females. Fertilized eggs develop into females and unfertilized eggs develop into males. How does the process of sperm production in male honey bees differ from sperm production in other animals?
a. Male honey bees use meiosis I only, whereas other animals use both phases of meiosis.
b. Male honey bees use meiosis, whereas other animals use mitosis.
c. Male honey bees use mitosis, whereas other animals use meiosis.
d. Male honey bees can use mitosis or meiosis, whereas other animals can only use meiosis.
Answer:
The correct answer is option C.
Explanation:
In most of the male animals the production of sperms takes place through the process of meiosis. Meiosis occurs only in 2n or diploid cells. Thus the most of the animals produce sperm due to their diploid nature.
In male bees the sperm production is different than other animals as it is haploid cell and haploid cells produce sperms through mitosis. In haploid cells mitosis helps in produce more sperms.
Thus, the correct answer is option C.
All 113 baby mice in an experiment are Rr, the parents are probably (do a Punnett square to be sure)
a
RR x RR
b
RR x rr
c
Rr x Rr
Answer:
The correct answer is option B.
Explanation:
If am individual cross between two true breed mice the probability of offspring with heterozygous condition is 100 percent in such cross. True breed is an individual organism with homozygous for the particular character either dominant or recessive.
So, if mice with RR (purebred or homozygous dominant) bred with mice with rr (homozygous recessive), all the offspring will be heterozygous in genotype which is Rr.
Thus, the correct answer is : option B. (Punnet square is attached)
Answer:
B
Explanation:
The woman marked with a question mark is your friend. Knowing that you are taking Genetics, she comes to ask you for advice: she wants to have children, but is afraid that they will be sick with the disease. Her husband and her mother have no family history of HD. What is the probability that she is sick? What is the probability that her children will be, without knowing her own status regarding the disease?
Answer:
Explanation:
The woman with the question mark is not sure if she has the HD disease,
The mother had no history of the disease this means she is not a carrier of the disease but we are not sure of the fathers genotype.
If the father is a carrier in an homozygous dominant form(aa) and the mother does not have the disease her. gentotype is AA
A A ×aa
Aa Aa Aa Aa This means all their offspring will be Carrier of the disease because each parents contributes 50% of the gene their offspring is made of.
The probability that she is sick is 0% but she could be a carrot of the disease in an heterozygote form
If the woman who is a carrier (Aa)of the disease marries a man with no history of the disease(AA)
Aa ×AA
I
AA AA Aa Aa
The probation of their offspring being a carrier in heterozygous form is 50% while the probability of the offspring being dominant of the disease is 0%. Hence, she should not be afraid since her mother and husband who could have contributed to determining the gene of this offspring are not carriers of this gene the offspring are safe.
proof that something is true is called
evidence
opinion
Obelief
claim
Answer:
Evidence
Explanation:
Evidence is proof that something is true
A scientist isolates a microbe from a contaminated water source. She thinks that the organism might be a new bacteria that is capable of surviving in the presence of lead, a heavy metal. She makes tubes of growth medium containing either no lead, 0.1 mg lead, 0.25 mg lead, 0.5 mg of lead or 1 mg of lead. She inoculates each tube with the 10 x 103 cells of the new organism and then incubates the inoculated medium at 37oC. After 48 hours, she examines the tubes of medium and finds that there is no growth in any of them. However, she finds that the bacteria grew fine in medium that did not contain any lead. She decides to repeat the experiment using lower concentrations of lead than those she used initially.
what conclusion can the scientist in this scenario make from her result?
1) all contaminated water contains high levels of lead and other heavy metals
2) the amount of lead used in the experiment killed the bacteria being tested
3) all experiment should be repeated three times or more
4) lead-contaminated water does not contain any bacteria at all
5) the test bacteria take more than 48 hours to grow in the laboratory when incubated at 37 degree Celsius
Answer:
2)
Explanation:
The positive control is the treatment where bacteria grew without lead. Since positive control indicates the presence of bacteria in the experimental conditions, it is possible to confirm that they only death in presence of this metal. However, it is important to note that it is imperative to repeat this experiment three times and also to include a negative control in order to confirm these results.
After examining this ecosystem,
identify and list 10 things the features you
think create this ecosystem.
Answer:
Various biotic & abiotic elements create ecosystem.
Explanation:
Ecosystem is a geographic system where plants, animals, other organisms, weather & other climatic factors create an ambience of prevailing life.
Ecosystem has following components :
Biotic Components : Living organisms & creatures, biodiversity Abiotic Components : Non Living organisms like Water, Air, Land etcName 3 hormones that have a direct impact on calcium metabolism relating to the skeletal system
Answer:
Three major hormones (PTH, vitamin D, and calcitonin) interact to maintain a constant concentration of calcium, despite variations in intake and excretion.
Explanation:
The second major hormone involved in the regulation of calcium metabolism and skeletal remodeling is vitamin D, which includes cholecalciferol (vitamin D3) of animal origin, as well as ergocalciferol (vitamin D2) of plant origin.
Which of the following statements about cell differentiation is true?
A. Cell differentiation occurs only in adult organisms
B. Cell differentiation cannot be affected by the environment
C. Cells differentiate because the dna in each cell of an organism is different
D. Cells differentiate because different areas of the dna are activated in each cell type.
Answer:
I think is B, Cell differentiation cannot be affected by the enviroment
How has human activity changed the planet?
Answer:
a lot of things
Explanation:
you see, we have polluted the planet, and if we keep on doing it, then the planet will die
Explanation:
human impact on the environment or anthropogenic impact on the environment includes changes to biophysical environmsnts and ecosystems, biodiversity, and natural resources caused directly or indirectly by humans including global warming, environmental degradation (such as ocean acidification) etc
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I will give 55 points to answers this correctly!
The tometti fossils are most related to?.......
Answer:
the tometti fossil are most related to ostriches or to crocodiles.
Phosphorus is a critical constituent of cellular fluids because of its role: a.as a sodium ion transporter in body cells b.in the synthesis of amino acids c.in the synthesis of phospholipids to transport fats through the blood d.in binding with calcium in the muscle tissues e.as a buffer in maintaining the optimum body pH
Answer:
e is correct
Explanation :
Phosphorus is critical because this element is required for enzymatic activities that take place during glycolysis, in the metabolism of glutamine to form ammonia (ammoniagenesis) and also in oxidative phosphorylation, where the cells produce energy from the generation of ATP from ADP.
In serum (blood plasma), the inorganic phosphate is combined with oxygen (O2) to form diverse types of phosphates (PO4) molecules that play key functions in muscle activity, nervous system development, and bone growth.
Serum phosphate is a critical buffer that maintains the acid‐base balance in the urine. The serum phosphate level in an adult must be in the range of 2.5 to 4.5 mg/dl, being higher levels indicative of hyperphosphatemia. This inorganic phosphate has important functions during the ATP synthesis, cyclic AMP, post-translational modification (i.e., protein phosphorylation), and also as an intracellular buffer.