Which one of the following is a result of programmed cell death?
A) formation of fingers in humans
B) gastrulation
C) formation of the notochord
D) formation of the brain
A
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________ is a directional movement in response to a graded chemical stimulus.
Fill in the blank(s) with the appropriate word(s).
What idea is shared by both Lamarck's and Darwin's theories of evolution?
A. Adaptation is driven by differences in survival and reproductive success. B. Environmental changes can lead to the modification of traits. C. Traits acquired during an individual's lifetime can be inherited by their offspring. D. Evolution involves a continuous increase in complexity.
Jennifer received a gamma globulin shot after being exposed to hepatitis. The gamma globulins served what function?
A. osmoregulatory molecules B. transport molecules for glucose C. blood clotting agents D. transport molecules for cholesterol and iron E. antibodies
Macronutrients are defined as those elements
A. required in relatively large amounts. B. usually needed, but not always available. C. only taken up through the soil. D. required in certain relative amounts in the plant.