Which of the following is not an adaptation of reptiles for life in a terrestrial habitat?
a. internal fertilization
b. an amniotic egg
c. better developed lungs
d. dry, scaly skin
e. vertebrate column
E
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What color of light is not strongly absorbed by chlorophyll?
A. green B. violet-blue C. red D. yellow-orange
Unlike members of the Bacteria, most archaeons have linear chromosomes with multiple origins of replication.
Answer the following statement true (T) or false (F)
If a cell of C. elegans is preparing for division but fails the G2 checkpoint, which of the
following is likely to occur?
a. It will enter the mitotic phase. b. It will undergo cytokinesis. c. It will undergo apoptosis. d. DNA replication will occur.
Which statement about muscle contraction is false?
a. The sliding filament model was developed by Hugh and Andrew Huxley. b. Acetylcholine released into the synaptic cleft stimulates muscle contraction. c. During contraction, the muscle length does not change, but the actin and myosin filaments shorten. d. Once the T tubules are depolarized, they open Ca2+ channels in the sarcoplasmic reticulum. e. Cross bridges are formed between myosin and actin during muscle contraction.