An igneous rock has small, dark crystals. Which statement also accurately describes this rock? O It is an intrusive rock.
O It has a coarse texture.
O It was found on Earth's surface.
O It was formed from slow cooling.

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In which of the following ways is the function of the surface of a microsphere similar to the function of an actual cell membrane? a.both make it possible for the conditions in the interior to be different from the conditions outside. b.both provide a barrier that keeps water from flowing across it so the interior remains dry. c.both separate the rna that forms in the interior from any rna that might form in the environment. d.both can actively move molecules into the interior or out into the surrounding environment.

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi