The letters G, Q, R, and C are used to describe bands that appear on chromosomes. The letters refer to
A. the position of the bands.
B. the staining procedure used to reveal the bands.
C. the size of the bands.
D. the types of genes found within the bands.
E. the relative importance of the bands in karyotyping.
B
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In humans, brown adipose tissue is used for ____
a. nitrogenous waste processing b. controlling blood pressure c. nonshivering thermogenesis d. digestion of fats e. cooling the body when exposed
What adaptation arose in plants that allowed the uptake of gases without drying out on land?
A. production of a cuticle B. development of stomata C. production of pollen D. development of vascular tissue E. production of lignin
Even though a hydra only has a nerve net, not a central nervous system, it still has
A. synapses. B. gray matter. C. white matter. D. an autonomic nervous system. E. the same neurotransmitters as humans.
Which hormone affects the greatest variety of cell types?
A) parathyroid hormone B) melatonin C) growth hormone D) calcitonin