The biodiversity crisis refers to

A. an area in the tropics where extinction rates are high.
B. the global elevated loss of species over the last several hundred years.
C. recent extinctions due to human-induced climate change.
D. the difficulty in restoring disturbed habitats.


B. the global elevated loss of species over the last several hundred years.

Biology & Microbiology

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Which of the following hominin lineages is correct?

A. Homo ergaster Homo erectus Homo sapiens B. Homo ergaster Homo neanderthalensis Homo sapiens C. Homo ergaster Homo habilis Homo sapiens D. Homo ergaster Homo heidelbergensis Homo sapiens E. Homo ergaster Homo rudolfensis Homo sapiens

Biology & Microbiology

The _____________ bacterial group contains organisms that normally inhabit the intestinal tracts of humans (depending on diet), and can additionally break down cellulose

A. Bacteroidetes B. Firmicutes C. Heliobacteria D. Gram-positive E. Proteobacteria

Biology & Microbiology

In the third stage of aerobic respiration, _____ is the final acceptor of electrons

a. water c. oxygen b. hydrogen d. NADH

Biology & Microbiology

ALL of the following organisms have been responsible for acid mine drainage EXCEPT

a. Acidithiobacillus ferrooxidans. b. Ferroplasma. c. Leptospirillum ferrooxidans. d. Thermoplasma.

Biology & Microbiology