Even though biology is a broad field of study, ______ serves as a central theme that unifies all of biology.

A. regulation
B. response to the environment
C. order
D. evolution


D. evolution

Biology & Microbiology

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Infection with Streptococcus pyogenes (bacterium that causes strep throat) may generate antibodies or T cells that react with heart muscle, which has a similar structure to the surface of S. pyogenes. These antibodies can damage heart muscle with autoimmune attacks, leading to rheumatic fever. This is an example of which of the following?

a. immunodeficiency b. delayed hypersensitivity c. autoimmune molecular mimicry d. immediate hypersensitivity

Biology & Microbiology

The C-value is the amount of DNA in a

A) haploid genome. B) diploid genome. C) bacterial genome. D) eukaryotic genome. E) cell's nucleus.

Biology & Microbiology

Formation of ____________________ is an intermediate stage in the development of colon cancer. Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

Semen can be unambiguously identified by the presence of ___ when observed under a microscope.

What will be an ideal response?

Biology & Microbiology