Which is a disadvantage of an exoskeleton?
a. It must be shed (and a new one made) for its owner to grow.
b. It does not provide as efficient a muscle anchorage as an endoskeleton.
c. It allows for excess water loss.
d. It is not flexible enough to allow a full range of movement.
e. It is not able to absorb pigments for sufficient camouflage.
a
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Which of the following is one of the assumptions of the Hardy-Weinberg law?
A) The population is small. B) Non-random mating occurs within the population. C) Mutations appear in the gene pool at high frequency. D) Migration occurs into or out of the population. E) The ability of all genotypes to survive and reproduce is the same.
Which system produces red blood cells?
a. endocrine b. skeletal c. muscular d. immune e. integumentary
A Gram-negative bacteria will have a peptidoglycan layer that is sandwiched between two plasma membranes and will stain purple.
Answer the following statement true (T) or false (F)
________ is accumulated secondary xylem.
Fill in the blank(s) with the appropriate word(s).