In cases where selection consistently favors a higher (or lower) value of a trait or phenotype, the result over time is a change in the average value of a trait in the population. This mode of selection is known as ________
A) directional selection
B) stabilizing selection
C) disruptive selection
D) selection gradient
A
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Match the term on the left with its definition or description on the right.
A) energy from carbon, carbon from sunlight B) electron donor is water C) energy from sunlight, carbon from organic sources D) electron donor is carbon dioxide E) energy from sunlight, carbon from CO2 F) light-dependent generation of NADPH G) use electron donors such as sulfide and thiosulfate 1) photoreduction 2) photoheterotrophs 3) photoautotrophs 4) oxygenic phototrophs 5) anoxygenic phototrophs
This hormone is secreted from the posterior pituitary and regulates muscle contraction.
A. antidiuretic hormone B. prolactin C. adrenocorticotropic hormone D. oxytocin E. epinephrine
An enzyme is what type of macromolecule?
a. carbohydrate b. protein c. lipid d. element
Organisms that live optimally in cold temperatures are called barophiles
Indicate whether the statement is true or false.