All echinoderms (sea stars and sea urchins) have:
A. a cardiovascular circulatory system and
bilateral symmetry.
B. a water vascular system and five-fold
symmetry.
C. a cardiovascular circulatory system and
five-fold symmetry.
B
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You are given the following list to remember: cow, horse, sheep, dolphin. If you remember, cow, horse, sheep, it is probably due to ___________. If you remember dolphin, it is likely due to ___________.
Fill in the blank(s) with correct word.
In most developing countries, ________
A) birth rates equal death rates, so the population is fairly stable B) birth rates are lower than death rates, so the population is declining C) birth rates are lower than death rates, so the population is growing rapidly D) birth rates are much higher than death rates, so the population is growing rapidly
The profundal zone is home to organisms that are
A) intertidal. B) adapted to high levels of light. C) photosynthetic. D) eutrophic. E) decomposers and detritivores.
Which of the following is NOT true about biodiversity?
What will be an ideal response?