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Q1. Eastern tent caterpillars (Malacosoma americanum) live in large groups in silk nests, or tents, which they build in trees. They are among the first insects to be active in early spring, when daily temperature fluctuates from freezing to very hot. Over the course of a day, they display striking differences in behaviour: early in the morning, they rest in a tightly packed group on the tent's east-facing surface. In mid afternoon, they are on it's under surface, each caterpillar hanging by a few of its legs. Suggest a hypothesis to explain this behaviour. How could you test it?
Q2. As a pea plant grows, its root cells divide by mitosis. If the diploid chromosome number of the plant is fourteen, how various chromosomes will each newly formed root cell have?
Which characteristic of cell membranes might explain why fat-soluble substances such as chloroform and ether rapidly affect cells.
For each step of gene expression, explain how DNA differences lead to phenotypic differences in the ability to taste PTC.
Given that most polyps are asexual and the medusae aresexual, how is the genetic variation perpetuated by the cnidariansthat do not have a medusa stage?
Do you think that a prenatal test is worthwhile if it detects a genotype, but cannot predict the phenotype? Discuss the risk/benefit issues of this situation.
What is the explanation for the fact the most cells are small and have cell membranes with many convolutions.
Both the endocrine and nervous system are main regulating systems of the body though the nervous system has been compared to an airmail delivery system and the endocrine system to the pony express. Briefly explain the comparison.
Cells are composed of compartments called organelles. Discuss why this kind of organization helps the cell carry out its diverse functions.
How many protons are pumped across the thylakoid membrane during oxygenic photosynthesis of two waters to O2?
The ABO blood group assorts independently of the Rhesus (Rh) blood group and the MN blood group. Three alleles, IA , IB , and i, occur at the ABO locus.
Which of the following disease is an autosomal dominant cause of dwarfism?
Assume you wish to increase fruit diameter in tomatoes, and you want to estimate heritability for this trait. You measured the diameter of tomatoes in two inbred lines.
Populations evolve for many reasons. Assume there is a population of plants that have either purple flowers or white flowers, and allele for purple flowers is dominant.
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