Males of some species have proteins in their ejaculate that cause the female to be less attractive to other males for some period of time. such a trait probably evolved initially through but could also lead to if remating is beneficial for females
a) male-male competition; female choice
b) runaway selection; female choice
c) male-male competition; sexual conflict and antagonistic coevolution
d) female choice; sexual conflict and antagonistic coevolutio

What do scientists need to look at before developing an argument

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.