Myosin heads have binding sites for _____.

A. ATP and calcium
B. ATP and actin
C. tropomyosin and troponin
D. actin and calcium
E. tropomyosin and actin


Answer: B. ATP and actin

Biology & Microbiology

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The lowest level of biological organization that can survive and reproduce is the ____

a. cell b. tissue c. proton

d. nucleus e. DNA

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Which of these are produced directly by meiosis in pine?

a. sperm cells. b. pollen grains. c. microspores. d. microspore mother cells.

Biology & Microbiology

Which of the following statements about parasitism is NOT true?

A. The host is generally larger than the parasite. B. Smaller parasites often live as endoparasites within the body of the host. C. Ectoparasites are attached to the outside of the host's body by specialized organs. D. Some organisms and all viruses are obligate parasites and must live inside a host. E. An efficient parasite usually kills its host.

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Liverworts can reproduce asexually by releasing spores from the thallus.

Answer the following statement true (T) or false (F)

Biology & Microbiology