Answer: Option C and E are correct.
Explanation:
Phylum molluscs are invertebrates species. They are the second largest phylum in the animal kingdom .Most mollusc live in marine and others live in freshwater and terrestrial habitat. Molluscs are ceoomates and they have three universal structures which are the mantle (breathing and excretion),radula and nervous system. The molluscs include snail, oyster,clams, periwinkles,octopus, squid e.t.c.
The larvae of molluscs are bilateral symmetrical while the adults are asymmetrical. Molluscs can produce shell, the presence of shell is an inclusion in the phylum.
Molluscs have three body part, the head, visceral mass and muscular foot
Answer: Options B and E are correct
Explanation: molluscs are found in freshwater, marine and terrestrial habitat. Some small species such as the land snail lives in dampy and dark places in terrestrial habitats. Molluscs are animal, are multicellular, have tissue, a digestive tract which includes mouth, stomach, anus and they also possess an oral structure called the radula. Some cephalopods do not have shells as they have lost their shells at one point in evolution and examples include octopuses. Lobsters are crustaceans belonging to the phylum arthropoda. Molluscs do have three main body parts head, visceral mass and the muscular foot.
In 1906, Harden and Young, in a series of classic studies on the fermentation of glucose to ethanol and CO 2 by extracts of brewer's yeast, made the observations inorganic phosphate was essential to fermentation; when the supply of phosphate was exhausted, fermentation ceased before all the glucose was used; during fermentation under these conditions, ethanol, CO 2 , and a sugar phosphate accumulated; when arsenate was substituted for phosphate, no sugar phosphate accumulated, but the fermentation proceeded until all the glucose was converted to ethanol and CO 2 . Which enzyme of glycolysis requires inorganic phosphate and, therefore, stops when no phosphate is available
Answer:
The enzyme is Glyceraldehyde-3-phosphate-dehydrogenase. (GAPDH). It is the enzyme that converts Glyceraldehyde-3-phosphate to D-glycerate 1,3-bisphosphate; the sixth Glycolytic pathway for breaking down glucose to ethanol, C02 in Glycolysis. This enzyme requires inorganic phosphate as substrate for the catalytic reaction to proceed. Since enzymatic reactions take place by forming enzyme-substrate complexes, absence of the inorganic phosphate substrate ; stops the conversion and progress of fermentation .
If an organism has a recessive phenotype for a trait following simple Mendelian inheritance: ________-
Answer:
If an organism has a recessive phenotype for a trait following simple Mendelian inheritance, there is only one possible genotype that can be attributed to them. For example green eyes (C) is dominant over grey eyes (c). If an organism has blue eyes, the only possible genotypic combination is (cc), as there cannot be any presence of the dominant gene.
Final answer:
If an organism has a recessive phenotype for a trait following simple Mendelian inheritance: it means that the organism's genotype contains two recessive alleles, also known as being homozygous recessive.
Explanation:
An organism with at least one dominant allele will have the phenotype of the dominant allele, meaning that the recessive trait will only be exhibited when both alleles for the trait are recessive. This is consistent with Mendel's law of segregation, which states that allele pairs segregate during gamete formation and randomly recombine during fertilization.
In practical terms, if both parents are carriers of a recessive trait, there is a 25% chance for each child to express the recessive trait.
This can be demonstrated with a test cross, where an organism with a dominant phenotype (if heterozygous) is crossed with an organism that is homozygous recessive, potentially resulting in a 1:1 ratio of the offspring displaying the dominant to recessive phenotype.
NC State is a community that is strong because of the diversity of our perspectives and experiences. Please describe how you could contribute to or benefit from campus diversity.
Answer:
One thing that I can contribute to the NC State Community campus diversity is my culture and my background.
I’m a first-generation American born Nigerian. My parents are from Nigeria and relocated to America some years before I was born. This as lead to basically two influences in my life, the influence of the Nigerian culture from my parents and my community, and the influence of the U.S. culture.
Basically, these are the two influences in my life, I had to mix the varying unique ways to living into one and take good advantage of life out of both worlds.
At majority of the time, my beliefs align with the beliefs of a typical Nigerian but at other times I see myself conflicted due to the varying or separate backgrounds.
I believe in living a day at a time and to enjoy the present moment so as to get the best from both backgrounds which has structured me into the person I am today.
Contributing to or benefiting from campus diversity at NC State involves actively engaging with different perspectives and experiences to enrich the community and prepare for a globally diverse workforce. This includes sharing personal experiences, supporting inclusivity efforts, and developing an understanding and empathy toward diverse backgrounds.
Explanation:Contributing to or benefiting from campus diversity at NC State involves understanding and engaging with the multitude of perspectives and experiences present within the community. Embracing diversity means more than just acknowledging different demographic backgrounds; it involves actively participating in a community that appreciates and learns from these differences. Adding to this diversity could mean sharing personal experiences and perspectives that are less represented on campus, thereby enriching the academic and social environment for everyone. It could also involve engaging with and supporting efforts that aim to make the campus a more inclusive space, such as partnering with the Diversity Office or participating in events that celebrate different cultures and identities.
From benefiting from campus diversity, one can gain a broader understanding of the world, develop greater empathy and communication skills, and prepare for a global workforce that values diversity and inclusivity. In turn, contributions to diversity can take many forms, such as advocating for greater representation within the university, contributing to the creation of more inclusive curricula, or simply being an active and empathetic participant in conversations about diversity and inclusion.
In dogs, black fur is dominant to white fur. Two heterozygous black dogs are mated. What would be the probability of the following combinations of offspring in a litter of six pups?
a) All with black fur.
b) Four with black fur and two with white fur.
c) At least two of the pups having white fur.
d) The firstborn pup with white fur, and among the remaining five pups, three with black fur and two with white fur.
This problem uses the concepts of Mendelian genetics and binomial probability to calculate the chances of various offspring combinations regarding black and white fur in dogs, assuming that the parent dogs are heterozygous for the trait.
Explanation:In this case, we are making use of the principles of Mendelian genetics to determine the probability of different outcomes when two heterozygous black dogs are mated.
a) As each pup is an independent event, the probability of an offspring being black is 0.75 (3 out of 4 possibilities). The likelihood of all six pups being black then is (0.75)^6 = about 0.18, or 18%.
b) For four black fur and two with white fur, this is a binomial probability case. Using the binomial coefficient, it works out to (6 choose 4)*(0.75^4)*(0.25)^2 = about 0.32, or 32%.
c) The probability of at least two of the pups having white fur is 1 minus the probabilities of having none or only one white puppy, which works out to 1- [(6 choose 0)*(0.75^6)*(0.25^0)+ (6 choose 1)*(0.75^6)*(0.25)] = about 0.89 or 89%.
d) For the firstborn pup with white fur, and among the remaining five pups, three with black and two with white, it would work out to (0.25)*(5 choose 3)*(0.75^3)*(0.25^2) = about 0.10 or 10%.
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In muscles, ATP is generated by glycolysis from two sources of glucose. One source is glucose that is broken down from glycogen stored in the muscles, and the other is from glucose that is taken up from the blood. Which of the following statements is true? A) A net 3 ATPs are generated per glucose from glycogen instead of a net of 2 ATPs from glucose taken up from the blood B) a net 2 ATPs are always generated per glucose regardless of its source C) glycogen is broken-down into UDP-glucose D) glucose only comes from glycogen α(1,4) links and not α(1,6) branches E) none of the above
Answer:
The answer is B a net 2 ATPs are always generated per glucose regardless of its source
Explanation
Glycogen breaks down in the muscle so as to have enough glucose for muscle contraction and it produces 2ATPs
Glycogen also breaks down in the liver to release enough glucose which gets to the blood stream and is then taken up by other cells. It also produces 2ATPs at the expense of 6ATPs
One of your classmates has symptoms of protein deficiency. You suspect that she might have a mineral deficiency due to her diet of nothing but canned spaghetti. Which of the following minerals should you test for first?
A. IronB. CopperC. ManganeseD. MolybdenumE. Sulfur
Answer:
Sulphur, because it is the major building element for protein synthesis.
Explanation:
A diet of only canned spaghetti has no Sulphur contents ( the only mineral in spaghetti is iron( 4mg ). But most enriched canned spaghetti contains 4g protein. However the sulphur in this protein would have been broken down during heat processing and packaging to sulphides(picked up by sulphur resistant enamel in the can). Therefore she has been on no protein diet but just on purely carbohydrate diet, hence protein deficiency.
Consequently,her body sulphur content is very low. Sulphur is the major content of some amino acids in the body of animals; especially in formation of methionine and Cysteine structures.
The sulphur content of Cysteine residues provides disulphide bridges(S-S) in polypeptide chains which is important for assemblage,storage and stability (as covalent bonds) of protein structure needed for protein synthesis. In addition, Methionine is an essential amino acid, needed in protein synthesis,
Thus lack of sulphur results in lack of methionine and cystenine and therefore ,deficiency of protein .
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The DNA changes that are described in Henry’s story are changes to the coding strands of the CYP2C9 genes. What is the function of the coding strand and how does it differ from the function of the template strand of Henry’s CYP2C9 gene?
Answer: the coding strand of Henry CYP2C9 aids in the determination of the precise/correct nucleotide sequence of the RNA strand produced after transcription
Explanation: The template strand functions in the production of the RNA strand during transcription ie the RNA strand is complementary to the template strand. RNA produced runs from the 5' to 3' direction. The coding strand differs from the template strand in that it is the strand that contains the exact nucleotide sequence as the RNA strand but differs in that the RNA is replaced with uracil instead of thymine and it also runs in the 5' to 3' direction.
Final answer:
The coding strand of DNA is the sequence that corresponds to the mRNA sequence produced during transcription, while the template strand is the actual template used by RNA polymerase to synthesize mRNA.
Explanation:
The function of the coding strand of DNA is to serve as the basis for the mRNA sequence during transcription, albeit indirectly. The coding strand has the same sequence as the mRNA, with the only difference being that thymine (T) bases in DNA are replaced by uracil (U) in RNA.
On the other hand, the template strand, also known as the non-coding strand, is the direct template for mRNA synthesis.
RNA polymerase uses this template strand to align and add the appropriate RNA nucleotides to form a new mRNA strand that is complementary to the template strand and matches the coding strand (except for T being replaced by U).
why is reproduction considered as a life function?
Answer:
why is reproduction considered as a life function?
Reproduction is considered as life function because it enable life continuity as a result of the new generation brought to life. Inheritable characteristics are being passed from one generation to another as a result of reproduction.
Explanation:
Without reproduction, there would not be life continuity, life would have end without it as no character would have been inheritable
Answer: Reproduction is considered as life function because it is important for living things survival and without it life will come to an end. Reproduction lead to life continuity and multiplication of living organisms. A particular organism can reproduce to produce offsprings,offsprings reproduce to produce offsprings and it continues like that. Reproduction lead to life continuity and prevention of extinction of species.
Explanation:
Reproduction is the process whereby offsprings are generated or produced from parents. Reproduction can either be sexual or asexual reproduction. In sexual reproduction, two gametes are involved and fuse to form offsprings.
In asexual reproduction, a single parent cell can replicate itself. Reproduction is a life function because without it, there will be extinction or species and life will come to an end.
"Consumers do not typically perform an LCA before making a purchase, though they might use the results from an LCA that have been summarized on a label or on a company's website.____________-
Answer:TRUE
Explanation:LCA(LIFE CYCLE ASSESSMENT) is a system through the life cycle or shelf life of a product is assessed,it is usually done by regulatory bodies,the manufacturers of the product to enhance the knowledge and know the possible duration of use of a give product.
Life cycle assessment helps to value a product as it helps to determine the pricing of the product or services by the consumers. The higher the life cycle the better the pricing.
If a woman and her husband, who are both carriers, have three children, what is the probability that all three children have the normal phenotype? Express your answer as a fraction using the slash symbol and no spaces (for example, 1/16)
Answer: 1/64 would be normal
Explanation:
Let the woman phenotype be Yy, since a carrier is usually heterozygous;
Also let the husband phenotype be Yy
Then Yy seperate to yield two alleles "Y" and "y"
So, the cross of the two alleles:
"Y", "y" X "Y", "y"
F1 will be YY, Yy, Yy and yy
From the crossing,
- the normal phenotype are YY,
-the carriers are Yy, Yy
- while yy is recessive.
Since, the probability that one of their offspring is normal is 1/4; for three children, then 1/4 x 1/4 x 1/4 = 1/64
Thus, probability that all three children are normal is 1/64
What is the significance of the fact that there are air molecules in a medium?
Answer:
The molecules in the air can be displaced by a force creating sound waves. Vibrations generally travel faster in a solid compartment than as in gases.
The resurrection fern (Pleopeltis polypodioides) grows on the bark of southern live oak trees (Quercus virginiana). Resurrection ferns that grow on the underside of branches receive less water than those growing on the topside and, therefore, have a fitness of only 0.28. How many of these ferns will be non-reproducing?
Select one:
a. 52%
b. 72%
c. 80%
d. 28%
Answer:
Option B
Explanation:
In biology, fitness refers to the ability of an organism to survive, reproduce, mate and support evolution through gene transfer. A fitness of 0.28 signifies that only 28 percent of a given population are fit physically and able to reproduce while the remaining 72 % are unable to mate and hence cannot reproduce and contribute towards gene flow and evolution.
Hence, option B is correct