Insulin lowers blood sugar. If insulin levels are high shortly after a meal, we can conclude that insulin secretion is regulated by ________ feedback mechanisms
Fill in the blank(s) with correct word
negative
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In Huntington disease, a child will typically develop the disease if one parent also has it. It is as common in boys as in girls. This disease is
A. X-linked recessive. B. autosomal dominant. C. autosomal recessive. D. X-linked dominant. E. pleiotropic.
Which evolutionary process describes the movement of members of a species from one population to another?
A) natural selection B) migration C) mutation D) random genetic drift E) population genetics
A parasitic protist that presents a major health problem to backpackers and hikers if they drink unfiltered stream or lake water is
A) Didinium. B) Giardia. C) Plasmodium. D) Trypanosoma. E) Pfiesteria.
An animal's somatic cells contain 2n chromosomes. What happens to the number of chromosomes in the animal's gametes?
A. the number is reduced to n by mitosis B. the number is reduced to n by meiosis C. the number is increased to 4n by mitosis D. the number is increased to 4n by meiosis