Amino acids like glutamate stimulate ____ receptors on the tongue
a. bitter
b. salty
c. sour
d. sweet
e. umami
e
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Neuroglial cells do all of the following EXCEPT
a. metabolically support other neurons. b. form sheaths around neurons and control the rate of impulse transmission. c. form more than half of the volume of the brain. d. provide physical support. e. conduct action potentials.
Beetle pollinators of a particular plant are attracted to its flowers' bright orange color. The beetles not only pollinate the flowers, but they mate while inside of the flowers
A mutant version of the plant with red flowers becomes more common with the passage of time. A particular variant of the beetle prefers the red flowers to the orange flowers. Over time, these two beetle variants diverge from each other to such an extent that interbreeding is no longer possible. What kind of speciation has occurred in this example, and what has driven it? A) allopatric speciation; ecological isolation B) sympatric speciation; habitat differentiation C) allopatric speciation; behavioral isolation D) sympatric speciation; allopolyploidy
A trichome is a bacterial cell with three different photosynthetic pigments.
Answer the following statement true (T) or false (F)
Which system produces red blood cells?
A. Endocrine B. Skeletal C. Muscular D. Immune E. Integumentary