Leaf thickness represents a trade-off between _____
A) light collection and carbon dioxide absorption
B) water retention and carbon dioxide absorption
C) water retention and oxygen absorption
D) light collection and oxygen absorption
B
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Which of the following do airborne microorganisms and microorganisms on light-exposed surfaces use to protect themselves from photooxidation?
A. Catalase enzymes B. Superoxide dismutase C. Carotenoid pigments D. Peroxidase enzymes
Oval body, eight dorsal plates, grazer on rocky
coasts is descriptive of a. gastropods. b. snails. c. clams. d. slugs. e. chitons.
For most metazoans, what is the name of the middle tissue layer during development?
a. mesoglea b. epiderm c. mesoderm d. ectoderm
Which cellular structure is the "shipping center", responsible for packaging materials with the cell?
a) Golgi apparatus b) chloroplasts c) ribosomes d) mitochondria