A bird sanctuary sometimes takes over the care of eggs or chicks of an endangered duck species if the parents are killed. They are sometimes able to use mothers of farm ducks to cross-foster the chicks, but it doesn't always work. Looking at the following data table, what is the critical period for imprinting in this species? (Note: DAH stands for "days after hatching".)Number of chicksAge of chicks when paired with foster motherSuccessful imprinting?(assessed at 14 DAH)?13eggs (0 DAH)yes71 DAHyes113 DAHyes58 DAHno911 DAHno
A. The critical period extends from 1 to 3 DAH.
B. The critical period ends sometime between 1 and 3 DAH. We can not determine from this data when the critical period begins.
C. The critical period extends from 3 to 8 DAH.
D. The critical period ends sometime between 3 and 8 DAH. We can not determine from this data when the critical period begins.
Answer: D
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In examining a multicellular protist, you notice that it uses pseudopods to engulf its food, that it reproduces asexually by mitosis, and that it has multiple nuclei
These data allow you to infer that the species belongs to which of the following protist groups? A) Euglenida B) Diatoms C) Foraminifera D) Diplomonadida E) Parabasalida
Adh____
a. increases glucose reabsorption b. decreases the filtration rate c. increases tubular secretion d. increases water reabsorption e. decreases amino acid reabsorption
Geographic isolation prevents
A. continental drift. B. mating. C. mutations. D. polygenic inheritance.