what does HIV do? (T-helper)

What will be an ideal response?


HIV infects and slowly kills a specialized lymphocyte called the T-helper cell.

Biology & Microbiology

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Cell walls are found in ____

a. animal cells only b. plant cells only c. fungal cells only d. plant and fungal cells e. animal and plant cells

Biology & Microbiology

List the three major steps in the development of angiosperms.

What will be an ideal response?

Biology & Microbiology

Currently, two extant elephant species (X and Y) are placed in the genus Loxodonta, and a third species (Z) is placed in the genus Elephas. Thus, which statement should be true?

A. Species X and Y are not related to species Z. B. Species X and Y share a common ancestor that is still extant (in other words, not yet extinct). C. Species X and Y are the result of artificial selection from an ancestral species Z. D. Species X and Y share a greater number of homologies with each other than either does with species Z. E. Species X, Y, and Z share a common ancestor, but nothing more can be claimed than this.

Biology & Microbiology

The ________ model of population growth assumes that essential resources are unlimited and that the environment is constant

Fill in the blank(s) with correct word

Biology & Microbiology