In the early part of the twentieth century, which of the following two views about the determination of diversity was more popular?
A) Diversity increases without limit over time.
B) Diversity reaches an equilibrium level, with factors adding species balanced by factors removing species.
Ans: A) Diversity increases without limit over time.
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Why do most replication errors occur?
a. DNA polymerases work very fast and mistakes are inevitable. b. DNA repair mechanisms do not work well. c. DNA replication is a slow and uncommon process. d. The hydrogen bonds between base pairs are weak. e. DNA ligase often binds incorrect sections of DNA.
Which of these diseases would most likely be identified by viewing a stained blood smear in a light microscope?
A. Ebola hemorrhagic fever B. Dengue fever C. HIV D. Chagas disease
Which stomach chamber is found in ruminants but not pseudo-ruminants?
a. omasum b. abomasum c. rumen d. reticulum
The best way to reclaim an ecosystem that is extensively damaged is to ____
a. allow natural succession to take over b. remove all predators from the area c. seed the area with a type of grass d. bring in beneficial insects e. implement ecological restoration