Amphibians are not completely free to live on dry land because
A. their food organisms live in water.
B. their ancestors were fish.
C. their reproduction depends on water.
D. they obtain oxygen from water through gills.
E. they can escape from predators by jumping into the water.
Answer: C
You might also like to view...
Above zero degrees, the actual number of degrees Celsius for any given temperature is ____ the degrees Fahrenheit.
(a) higher than (b) lower than (c) the same as (d) a or b
From an evolutionary perspective, germ-line mutations are more significant than somatic mutations. This is because:
A. somatic mutations affect only one or a few cells. B. somatic mutations are generally harmful. C. only germ-line mutations will appear in an individual's descendants. D. only germ-line mutations are potentially beneficial. E. somatic mutations affect only one or a few cells and only germ-line mutations will appear in an individual's descendants. Answer Point Value: 1.0 points Answer Key: C 5 Remember that, in Mendel's garden peas, the yellow gene determines flower color, with the A (yellow) allele dominant to the a (green) allele. In a population of 200 plants, the genotype frequencies are 50% AA, 25% Aa, and 25% aa. What are the allele frequencies? A. 50% A, 50% a B. 50% A, 25% a C. 87.5% A, 12.5% a D. 62.5% A, 37.5% a E. 75% A, 25% a
You construct a life table for a plant species and find that in all cases about the same proportion of the cohort survive to the beginning of the next time interval. What would you call this?
A. a Type I survivorship curve B. a Type II survivorship curve C. a Type III survivorship curve D. a semelparous life history adaptation E. populations regulated by density-independent events
The volume of air remaining in the lungs after maximal expiration is the:a
vital capacity. b. tidal volume. c. tidal capacity. d. residual capacity. e. residual volume.