When an electron in a pigment molecule is absorbed by a photon, it ____.
A. is always shared with another atom via a double bond
B. is always shared with another atom via a single bond
C. emits its extra energy and returns to its original energy level
D. moves to a higher energy level and remains there
E. moves to a lower energy level and remains there
Answer: C
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Water induces embryonic plant cells to release the hormone ________
a. gibberelin b. ABA c. auxin d. ethylene
Net primary productivity of boreal forest is generally lower than in temperate deciduous forest
Indicate whether the statement is true or false
Tawny owls (Strix aluco) pair-bond for life, with both members of a pair living and hunting in adjacent, well-defined
territories. Their reproduction is regulated in accordance with the resources, especially the food supply, present in their territories. Tawny owls can best described as: a. r strategists. b. K strategists. c. fecundists. d. life historists. e. scramblers.
Excessive collagen formation often results in a hard, raised scar called a ______.
Fill in the blank(s) with the appropriate word(s).