Why aren't organisms perfectly adapted to their environments?
a. There are physical constraints that cannot be overcome.
b. An organism's surroundings do not present a stationary target to which natural selection can optimize its phenotype.
c. The process of natural selection lacks foresight.
d. All of the above are true.
e. This is not always true; some organisms are perfectly adapted to their environments.
D
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The organ system that protects the underlying tissues from abrasion, prevents dehydration, and aids in regulating body temperature.
A) Muscular
G) Respiratory
B) Reproductive
H) Skeletal
C) Digestive
I) Nervous
D) Cardiovascular
J) Endocrine
E) Integumentary
K) Lymphatic
F) Urinary
A reproductive cell, or gamete, has:
A. one allele for each gene. B. two alleles for each gene. C. one allele for each gene if it is homozygous and two if it is heterozygous. D. one allele for each gene if it is truebreeding and two if it is an F1 offspring. E. between one and four alleles for each gene.
The presence of the strongest competitors in
the center of a group of animals may qualify the group for status as a(n) a. altruistic society. b. selfish herd. c. kin group. d. dominance hierarchy. e. sexual selection society.
Most lipids need to be attached to transport proteins to move through blood
Indicate whether the statement is true or false