Changes in proteins of the lens cause
a. astigmatism.
b. retinoblastoma.
c. myopia.
d. glaucoma.
e. cataracts.
E
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Suppose you count 40 green tobacco seedlings and 2 white tobacco seedlings in one agar plate. Do your results show that both parent plants were heterozygous for the allele?
What will be an ideal response?
Addison's disease is a disorder that results from a reduction in production of glucocorticoids and mineralocorticoids. Individuals with Addison's disease suffer from a variety of systemic symptoms including: muscle weakness, fever, issues with the gastrointestinal tract, and increased tanning. Considering this information, what type of signaling do you think that glucocorticoids and mineralocorticoids stimulate?
A. Synaptic B. Endocrine C. Paracrine D. Direct contact E. Autocrine
In some instances, environmental change causes a situation where one phenotype is favored for a period of time and then a different phenotype is favored for a period of time. This oscillating selection is most likely to lead to
A. a population with decreasing levels of genetic variation. B. an increasing population to maintain genetic variation. C. an increase in point mutations. D. the maintenance of genetic variation in the population. E. the elimination of rarer genotypes because of directional selection.
Present a detailed description of the actions of the regulatory proteins in inducible and repressible enzyme systems
What will be an ideal response?