What characteristics allowed reptiles to become completely terrestrial?
What will be an ideal response?
Reptiles evolved scaly skin that resists dehydration, internal fertilization so that the male sperm can swim through the female's body to reach the eggs, and amniotic eggs with shells that protect the egg from dehydration.
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A decrease in cortisol triggers secretion of CRH (corticotropin-releasing hormone) by the hypothalamus which then stimulates secretion of ____ by the anterior pituitary
a. cortisol b. adrenocorticotropic hormone c. adrenal cortex-stimulating hormone d. cortisol-stimulating hormone e. aldosterone
Air pollution researchers use which of the
following fungi to help them monitor air pollution levels?
a. mycorrhizal fungi b. mushrooms c. yeast d. lichens e. rust fungi
In Mendel's crosses the starting plants are referred to as the P generation
1.True 2.False
All of the following factors influence the development of song in male white-crowned sparrowsexcept:a
acoustical stimuli. b. genetics. c. visual stimuli. d. social interactions. e. innate behaviors