Which of the studies below provide evidence linking genes and behavior? (Check all that apply)
A. Mice that are lacking either the ephrinB3 or the EphA4 gene cannot walk normally, but instead hop like a kangaroo.
B. Twin studies comparing monozygotic and dizygotic twins have found a high heritability for height, although environmental influences like nutrition also play a role.
C. Fruit flies that are mutant for the genes dunce or rutabaga have impaired learning.
D. Two lines of fruit flies were created by repeatedly selecting for high or low aggressive behavior. After multiple generations, the high line was reliably more aggressive than the low line.
Answer: D
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A) notochord B) dorsal hollow nerve cord C) pharyngeal pouch D) coelom E) podia
The Na+/K+ pump creates a ____ charge inside the cell and a ____ charge outside the cell
a. negative; negative b. positive; negative c. positive; positive d. negative; positive e. neutral; positive
The different seasons of the year are caused by the
A. gravitational pull of the moon as it travels around the Earth. B. tilt of the Earth's axis as the Earth travels around the Sun. C. rotation of the moon around the Earth. D. rotation of the Earth on its axis. E. rotation of the Earth around the Sun.
A cell that is 98% water is placed in 50% salt water. This cell will
A. shrink. B. swell. C. shrink and then swell. D. remain the same size.