The number of species on an island depends on the size of the island and its distance from a mainland. This statement would most likely be made by _____
a. an explorer
b. a biogeographer
c. a geologist
d. a philosopher
B
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DNA sequencing suggests that among the green algae, the ________ are most closely related to land plants.
A. Stoneworts B. Volvox C. Ulva D. Chlamydomonas E. Spirogyra
When the ________ muscle of the leg contracts, the lower leg is moved closer to the thigh.
Fill in the blank(s) with the appropriate word(s).
What information would be most useful for studying the evolution of a worm species?
A. the diet of birds in the area that eat the worms B. similarities in histone genes between other worms and the studied worm C. the locations where the worms are found comparisons with other invertebrates in the same area
What is the name of the small gap that separates the axon terminal of a nerve from the sarcolemma?
A. sarcoplasmic reticulum B. synaptic vesicle C. T tubule D. synaptic cleft E. sliding filament