Alfred Wallace is best known for authoring an essay in which he proposed that ________

a. fossils found in deeper strata are older than those in more shallow layers
b. continental plates drift slowly across the surface of the planet
c. organisms change over time through evolution by natural selection
d. DNA base sequences encode the amino acid sequences of proteins


c

Biology & Microbiology

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If you eliminated all sources of calcium (dairy

products, some vegetables) from your diet, the level of which of the following would rise in an attempt to supply calcium stored in your body to the tissues that need it? a. aldosterone b. calcitonin c. mineralocorticoids d. parathyroid hormone e. all of these

Biology & Microbiology

The female reproductive whorl of a flower typically consists of one or more ____

a. petals b. carpels c. stamens d. receptacles e. sepals

Biology & Microbiology

If a material mixes readily with water it is identified as _________.

a. dehydrated b. hydrophobic c. hydrophilic d. saturated

Biology & Microbiology

One of the focuses of conservation biology is changing human behavior.

a. true b. false

Biology & Microbiology