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1. Food is moved throght the digestive tract throught aseries of involuntary muscualr contractions called.
a) mechanical digestionb) chemical digestionc) peristalsisd) stimuli
2. All eukaryote cells belong in which group?
a. domain Eukarya.b. domain archaea.c. domain bacteria.d. king protista.e. kingdom animalia.
220 colonies were counted after 24 hour incubation. How many colony-forming units were present per ml in the original culture?
Suppose that gene "h" is a sex-linked, recessive and lethal. a woman who is heterozygous for this trait marries a man and they have children who are born normal. What would be the predicted sex ratio of these children?
Assume you found your sibling's brother-in-law has had a sample submitted to the lab. This is a person you have never met, but that you know has been in trouble with the law.
If a pea plant that is heterozygous for round, yellow peas (RrYy) is crossed with a pea plant that is homozygous for round peas but heterozygous for yellow peas (RRYy), how many dissimilar phenotypes are their offspring expected to show.
chemosynthesis and fermentation are both ancient metabolic pathways and were probably used by some of the earliest life
You have done deep sequencing on somites and found a new tyrosine kinase transmembrane receptor (takky). You want to know whether it is specifically involved in somite boundary formation.
Using light microscopy you examine the soil samples and the goo from the degraded polyurethane. Will this approach allow you to observe all microorganisms present in the sample ? why or why not ? What are the limitations of this approach?
Explain why would temperature affect respiration rates and what is going on at the cellular level that could be impacted by either an increase or a decrease in the temperature in which an organism is found?
Activation of T cells requires that antigens be presented from antigen-presenting cells, not simply by exposure to the antigen in solution. What biological rationale may underlie this requirement - consider both from the perspective of how this can a..
In Tomatoes, the allele for red fruit is dominant over the allele for yellow fruit. The allele for tall plants is dominant over the allele for short plants.
A drug that does not dissociate has a molecular weight of 300. If 300 g of this drug are dissolved in 1000 ml of water, what is the osmolarity of resulting solution?
What was the mutational event that gave rise to the frameshift mutant? Determine precisely where the single nucleotide insertion or deletion occurred in the beta-lacatamase coding sequences.
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