Drag each label to the correct location on the chart. For each of the four major biomolecules, identify the name and structure of its monomer.

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.