When all continents were fused into one during the Permian Period, they were called
a. Laurasia.
b. Pangaea.
c. Gondwanaland.
d. Eurasia.
e. Amerasia.
B
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The majority of mammal species living today are ____, or placentals, including such diverse groups as rodents, bats,
whales, and primates.
a. protherians b. therapsids c. anthropoids d. eutherians e. metatherians
If a structure has no apparent function in one species, yet is homologous to a functional organ in another species, this structure is termed
A. homeotic. B. analogous. C. homologous. D. heterologous. E. vestigial.
Organisms that are well understood from a scientific standpoint and are often used in basic biological research are often called ________
A) recombinant DNA technology B) vectors C) restriction enzymes D) clones E) model organisms
Which of the following steps in the breakdown of glucose directly requires the use of oxygen?
A. glycolysis B. acetyl CoA conversion C. citric acid cycle D. electron transport chain E. None of these require oxygen.