Which habitat would most likely have the greatest species richness?
a. prairie
b. savanna
c. tundra
d. temperate desert
e. tropical rain forest
E
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Alcohol consumption adversely affects the synthesis of molecules involved in protein degradation, which can eventually lead to liver damage. Given this information, which organelle in liver cells is most directly affected by alcohol consumption?
A. Lysosome B. Golgi apparatus C. Nucleus D. Rough endoplasmic reticulum
Creutzfeldt-Jakob disease is
A. a spongiform encephalopathy of humans. B. also called "Mad Cow disease". C. caused by a chronic latent virus. D. caused by a viroid. E. initiated by an oncogenic virus.
The following are all functions of a typical plasma membrane except
A. expression of cellular identity B. selective transport of certain molecules and material C. reception of information D. transport of water and bulk material E. Be permanent in composition
Which of the following statements about cancer is false?
(a) Viruses cause some cancers. (b) Tobacco use is responsible for more than 20% of all cancer deaths. (c) A mutation in even a single cancer-critical gene is sufficient to convert a normal cell into a cancer cell. (d) Chemical carcinogens cause cancer by changing the nucleotide sequence of DNA.