An easy way to describe a radiolarian would be to say that it is

A. A paramecium that is capable of photosynthesis
B. Ameoba in a diatom shell
C. A diatom with many flagella
D. A red algae trapped in a glass casing


Answer: B

Biology & Microbiology

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An arrangement of microtubules located in the matrix of cilia and flagella is called the ________.

A. axial bundle B. axoneme C. axillary tubule D. axial filament

Biology & Microbiology

Substance E is made in the pancreas, travels through the blood, and binds to a surface receptor on a target cell. After

dimerization and autophosphorylation, the receptor activates a signaling protein. Substance E is therefore the ligand for ____.

a. a receptor tyrosine kinase b. a G-protein-coupled receptor c. a hormone receptor d. a ligand-gated ion channel e. guanylyl cyclase

Biology & Microbiology

In the back and forth evolutionary struggle between plants and virulent bacteria, plants use ____ immunity to combat

the bacteria.

a. effector-triggered b. systemic acquired c. gene-for-gene d. hypersensitive e. jasmonate response

Biology & Microbiology

Before a sperm can participate in fertilization, it must undergo ____ in the female reproductive tract

a. the acrosome reaction b. the cortical reaction c. spermatogenesis d. determination e. capacitation

Biology & Microbiology