What happens to a sarcomere when muscle contraction occurs?
A) It shortens.
B) It lengthens.
C) It remains the same.
D) It lengthens and then shortens.
A
Biology & Microbiology
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What is the main purpose of light-dependent reactions of photosynthesis?
A) to generate oxygen by "splitting" H2O B) to produce NADPH for use in respiration C) to produce NADPH and ATP D) to use ATP to make glucose
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What is the only known eusocial mammal?
A. humans B. naked mole rats C. Belding's ground squirrels D. prairie dogs E. honeybees
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A flower with petals, sepals, stamens, and one carpel is ____
a. perfect and incomplete b. imperfect and complete c. imperfect and incomplete d. perfect and complete e. sterile
Biology & Microbiology
Single-celled eukaryotes lacking a cell wall are
A) protozoa. B) fungi. C) algae. D) insects. E) water molds.
Biology & Microbiology