You spray your kitchen with an insecticide to kill the cockroaches.  A few survive and reproduce, producing a large healthy population in a few generations that all have similar genetic backgrounds.  This is an example of _____  

A.  assortative mating.
B.  bottleneck effect.
C.  mutation.
D.  migration.
E.  genetic drift.


B.  bottleneck effect.

Biology & Microbiology

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You investigated the cytoskeleton and found that all three elements, including the one you suspected, are completely normal. You then decide to look at the motor proteins to see if the cause might lie with one of them

Which of the following would be your hypothesis? A. The melanophores in these tadpoles have partially or non-functional kinesin that would normally transport organelles along microtubules to the center of the cell. B. The melanophores in these tadpoles have partially or non-functional kinesin that would normally transport organelles along microfilaments to the center of the cell. C. The melanophores in these tadpoles have partially or non-functional dynein that would normally transport organelles along microtubules to the center of the cell. D. The melanophores in these tadpoles have partially or non-functional dynein that would normally transport organelles along microfilaments to the center of the cell. E. The melanophores in these tadpoles have partially or non-functional myosin that would normally transport organelles along microfilaments to the center of the cell.

Biology & Microbiology

In Figure 16.1, how many mL is the residual volume?

A) 600 B) 1700 C) 2800 D) 2200 E) 1300

Biology & Microbiology

Which feature is not found in protozoans?

A) usually heterotrophic B) performs photosynthesis C) unicellular D) no cell walls E) may reproduce sexually or asexually

Biology & Microbiology

Desert plants have waxy coatings to help reduce water loss. Many also have modified leaves in the shapes of needles to reduce surface area and reduce water loss. These modifications are examples of :

What will be an ideal response?

Biology & Microbiology