4. watson and crick were the first to suggest that dna is
a. a short molecule
c. a protein molecule
b. the shape of a double helix
d. the genetic material
1. la
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Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

The image shows a group of fish. the type of social behavior shown in the image is called

Adaptive radiations can be a direct consequence of four of the following five factors. selectthe exception. a) vacant ecological niches b) genetic drift c) colonization of an isolated region that contains suitable habitat and few competitor species d) evolutionary innovation e) an adaptive radiation in a group of organisms (such as plants) that another group uses as food