The rigid chitinous exoskeleton of an arthropod has all of the following functions except it
A. prevents injury to the animal.
B. impedes water loss.
C. provides a place for muscle attachment.
D. maintains a uniform size for all individuals of that species.
E. protects the animal from predators.
Answer: D
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Which of the following describes homeostasis?
a. Maintaining constant internal conditions b. Capturing energy for metabolic functions c. Inhabiting the same specific environment d. Duplicating and distributing chromosomes
The two arms of adaptive immunity work together as follows:
a. ____-mediated responses target antigen in blood or interstitial fluid and involve ____ cells. b. ____-mediated responses target intracellular pathogens or altered body cells and involve ____ cells and ____ cells.
Golden rice was developed to deal with problems of ____________ deficiency
A. vitamin D D. carbohydrate B. vitamin A E. niacin C. protein
During the course of development, unspecialized cells become more committed to a specific fate. Indicate whether the statement is true or false