What is significant about cephalization?
A. The division of body parts allows repetition of important structures.
B. A concentration of sensory organs allows better detection of threats for motile organisms.
C. It allows animals to be triploblastic.
D. It is the basis for radial symmetry.
Ans: B. A concentration of sensory organs allows better detection of threats for motile organisms.
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Meiosis differs from mitosis in that meiosis
(a) requires two cycles of division for completion. (b) produces spores in plants but gametes in animals. (c) is only found in animals and not in plants. (d) both a and b.
Meiosis used Somatic or Germ Cells?
What will be an ideal response?
Red blood cells, or __________, contain the
hemoglobin that functions in rapid transport of oxygen and, to a lesser extent, carbon dioxide. Fill in the blank(s) with the appropriate word(s).
Before proteins can be used for cellular respiration, they must be broken down into:
A) amino acids. B) glucose. C) fatty acids. D) pyruvate.