Which of the following types of asexual reproduction is commonly observed among prokaryotes and a few eukaryotes in which the organism is divided into two or more parts, producing separate entities that resemble the original?

The insecticide endosulfan can suppress pheromone production. Pheromones are used to indicate reproductive receptivity for many organisms, such as red-spotted newts. Suppose a lake near an agricultural area becomes contaminated with endosulfan; what will be the possible effect of this on the population of red-spotted newts living on the lake?

All male mammals with reproductive and excretory systems have a _______ tube, which connects the testicles to the vas deferens.

Which of the following statements about human reproduction is true? 

Which explanation is most consistent with the Red Queen hypothesis?