Oxygen during the early development of the atmosphere was:
a. common.
b. rare.
c. important for photosynthesis.
d. about the same as now.
e. created from the cooling of hot lava.
B
Biology & Microbiology
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The catabolism of glucose begins with one or more of the glycolytic pathways that yield pyruvate.
Answer the following statement true (T) or false (F)
Biology & Microbiology
A collection of similarly specialized cells and any extracellular material they secrete and maintain describes
(a) an organ. (b) a system. (c) a tissue. (d) organelles.
Biology & Microbiology
The markers that identify "self" are actually
A) genes. B) proteins. C) lipids. D) small surface bumps. E) triplet codons
Biology & Microbiology
Chemical defenses are found in all of the following except
A. marine animals. B. insects. C. plants. D. snakes, spiders, and fishes. E. Batesian mimics.
Biology & Microbiology