The oxic atmosphere created conditions that led to the evolution of various new metabolic pathways, such as

A) sulfide oxidation.
B) nitrification.
C) iron oxidation.
D) sulfide oxidation, nitrification, and iron oxidation.


Answer: D

Biology & Microbiology

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In order for a muscle contraction to occur, cross-bridges must form between structures within a muscle cell. These cross-bridges form between ______ and _____.

Fill in the blank(s) with correct word

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If the nucleotide sequence in a DNA template strand is GGCTTAACCATT; the complementary mRNA strand will

have the sequence ____________________. Fill in the blank(s) with the appropriate word(s).

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Co-dominance

What will be an ideal response?

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A white blood cell surrounds and engulfs a worn-out red blood cell, forming a vesicle around the red blood cell. This process is called

- phagocytosis. - exocytosis. - pinocytosis. - active transport. - facilitated diffusion.

Biology & Microbiology