Describe the production and action of ADH
What will be an ideal response?
ADH, anti-diuretic hormone, is produced by the hypothalamus, but actually secreted by the pituitary. It is produced in response to lowered bodily fluids, as it acts to conserve water. Its action is on the distal convoluted tubule and the collecting duct, making them more permeable to water, which is reabsorbed back into the circulatory system.
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Cnidarians are
A. aquatic animals. B. Both land-dwelling animals and aquatic animals are correct. C. land-dwelling animals. D. arboreal animals. E. Both land-dwelling animals and arboreal animals are correct.
The autosomal (not X-linked) gene for brachydactyly, short fingers, is dominant to normal finger length. Assume that a female with brachydactyly in the heterozygous condition is married to a man with normal fingers
What is the probability that (a) their first child will have brachydactyly? (b) their first two children will have brachydactyly? (c) their first child will be a brachydactylous girl?
Why is human population genetic variation lower than the level of variation seen in other species?
A. Humans have a smaller population size than any other species. B. Humans have a larger population size than any other species. C. Human ancestral lineages are relatively old compared to other species. D. Human ancestral lineages are relatively young compared to other species. E. Humans have a much lower genetic mutation rate. F. Humans have much higher rates of gene flow than other species. G. Humans have a much lower birth rate and reproductive success compared to other species.
Isothermal amplification techniques, such as NASBA, utilize a single temperature for nucleic acid amplification thereby eliminating the need for thermal cycling instruments to precisely and quickly alter the reaction temperature. This often reduces the cost associated with molecular testing and infrastructure requirements. In what settings could this be advantageous?
a. Developing countries with limited health care facilities b. Field clinics during military operations c. Small clinics or hospitals without centra-lized laboratory facilities d. Urgent care clinics or pharmacies for point-of-care diagnosis e. All of the above