A chromosome has a gene for long toes. Which of the following would likely be homologous
to this chromosome?
a. a chromosome with a gene for short toes
b. a chromosome with a gene for long fingers
c. a chromosome with a trait associated with toe shape other than length
d. a chromosome from either parent
A
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In the figure, the pattern of divergent evolution is best illustrated by
A. A.
B. B.
C. C.
D. None is a good illustration of divergent evolution.
Which of the following is true concerning homeostasis?
A) Homeostasis is the maintenance of a rigid internal environment with no variation. B) Homeostasis allows for major fluctuations in body conditions. C) The maintenance of homeostasis relies mainly on positive feedback. D) Homeostasis is the maintenance of a relatively stable internal environment.
The methanogens, producers of methane gas, require environments that
A. are directly exposed to sunlight. B. have abundant oxygen and CO2. C. are extremely cold. D. are very acidic. E. are anaerobic with hydrogen gas and CO2.
Cotyledons develop as part of _____
a. carpels c. embryo sporophytes b. accessory fruits d. petioles