Visual acuity is highest when an image is focused on what part of the retina?  

A.  rods outside the fovea
B.  cones outside the fovea
C.  rods within the fovea
D.  cones within the fovea
E.  anywhere, as long as there is ample light


D.  cones within the fovea

Biology & Microbiology

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Which group of algae are a commercial source of agar and carrageenan?

a. red algae b. brown algae c. dinoflagellates d. euglenoids e. green algae

Biology & Microbiology

If you tagged organic carbon inside a chloroplast with a fluorescent label, the location most likely to have a high concentration of labeled carbon would be in the

A. Inside the thylakoid B. Stroma C. Thylakoid membrane D. Between the outer and inner membranes

Biology & Microbiology

Unlike passive transport, active transport requires

A.) concentration gradients. B.) diffusion. C.) energy from the cell. D.) vesicles.

Biology & Microbiology

Which of the following methods of enumerating cells is the only one to detect live cells?

A. direct microscopic count B. viable plate count C. turbidity D. coulter counter E. flow cytometer

Biology & Microbiology