The zig-zags in the Keeling Curve repeat:

What will be an ideal response?


every 12 months

Biology & Microbiology

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Which of the following genera fix nitrogen nonsymbiotically?

A. Nitrosomonas B. Nitrobacter C. Rhizobium D. Azotobacter

Biology & Microbiology

One way in which an archaean would differ from a bacterium is that the archaean would possess no:

A) DNA in its chromosome. B) peptidoglycan in its cell walls. C) ribosomes in its cytoplasm. D) RNA in its ribosomes.

Biology & Microbiology

Would you recommend a couple in which the male is infertile to seek genetic counseling? Why or why not?

What will be an ideal response?

Biology & Microbiology

Dating to about 3.5 to 3 million years ago, the famous fossil "Lucy," found in northern Ethiopia, represents a member

of ____.

a. Homo habilis b. Homo erectus c. Australopithecus africanus d. Australopithecus afarensis e. Homo neanderthalensis

Biology & Microbiology