Question

many male birds will expend a great deal of energy building nests. females will mate with the males who build the best nests. this is best described as an example of ____. natural selection sexual selection runaway selection an invasive species disruptive selection question 7 (2.5 points) with the extinction of the dinosaurs 65 million years ago, multiple niches that the dinosaurs once filled opened up and allowed mammals the opportunity to evolve and exploit those niches this is an example of ____

Explanation:

Sexual selection is a type of natural selection where individuals with certain traits are more likely to mate. In this case, female birds choose males based on nest - building ability (a trait), which is a form of sexual selection. Natural selection is a broader concept about survival and reproduction in general. Runaway selection is a more specific (and less common in basic explanations) form related to extreme trait exaggeration. Invasive species refer to non - native species causing harm. Disruptive selection is about favoring extreme phenotypes over intermediate ones.

Answer:

sexual selection