In animals, mitochondrial DNA
a. has 13 protein coding genes.
b. is inherited maternally.
c. is very compact with almost no intergenic DNA.
d. has genes for both tRNAs and rRNAs.
e. All of the above.
Ans: e
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The group mollusks includes:
A. gastropods and cephalopods. B. sponges and placozoans. C. crustaceans and bivalves. D. starfish and cephalopods.
Which ponds contained only killifish as predators?
a. primero and quinto b. segundo, tercero, and sexto c. tercero and quinto d. quarto, sexto, and septimo e. none of the above (all ponds containing killifish also contained cichlids)
A(n) ________ model of community structure assumes that the presence and absence of individual species in a community result from independent responses to the physical environment and interactions among species have no impact on community structure
Fill in the blank(s) with correct word
Na+ reabsorption is a(n) __________ process, while Cl- reabsorption is a(n) __________ process in the proximal tubule.
A Active; active B Active; passive C Passive; passive D Passive; active