In 2001, the ____ became the first invertebrate to be listed as endangered by the U.S. Fish and Wildlife Service

a. dodo
b. white abalone
c. Texas blind salamander
d. harvester ant
e. coelacanth


ANSWER: b

Biology & Microbiology

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Mitochondria most resemble _____

a. archaeans b. aerobic bacteria c. cyanobacteria d. early eukaryotes

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Human populations vary genetically, but the variation is subtle and not easy to find without large data sets. Most of the genetic variation in the human species exists between ________

Fill in the blank(s) with correct word

Biology & Microbiology

Long-distance runners like to train at high altitudes because the lack of oxygen there stimulates the

A) body to produce more lung tissue. B) capillaries to diffuse oxygen more slowly. C) muscles to contract faster. D) bone marrow to make more erythrocytes. E) muscles to contract less strongly.

Biology & Microbiology

Peptidoglycan layers are responsible for:

A. Absorption of nutrients B. Attachment C. Resist rupturing due to osmotic pressure D. Movement of the cell

Biology & Microbiology