Countercurrent exchange in the fish gill helps to maximize _____
A) blood pressure
B) diffusion
C) active transport
D) osmosis
B
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According to the logistic growth equation, = rmaxN,
A) the number of individuals added per unit time is greatest when N is close to zero. B) the per capita growth rate (r) increases as N approaches K. C) population growth is zero when N equals K. D) the population grows exponentially when K is small. E) the birth rate (b) approaches zero as N approaches K.
Herbivory does not affect a plant's ability to survive
Indicate whether the statement is true or false
Which of the following is responsible for the alpha-helical structure of proteins?
a. hydrophobic interactions b. nonpolar covalent bonds c. ionic interactions d. hydrogen bonds e. polar covalent bonds
Which of the studies below provide evidence linking genes and behavior? (Check all that apply)A) Fruit flies that are mutant for the genes dunce or rutabaga have impaired learning.B) Mice that are lacking either the ephrinB3 or the EphA4 gene cannot walk normally, but instead hop like a kangaroo.C) 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.D) Twin studies comparing monozygotic and dizygotic twins have found a high heritability for height, although environmental influences like nutrition also play a role.
What will be an ideal response?