#Question id: 16868
#General Aptitude
#Question id: 9185
#Section 2: Evolution
Plants are affected by an array of pathogens. Which of the following is a plant defense against disease?
#Question id: 12452
#Section 1: Ecology
#Question id: 10242
#Section 1: Ecology
Ecologist Robert Macarthur observed that five species of similar warblers coexisted on spruce trees because they
#Question id: 3464
#Section 2: Evolution
Adult male humans generally have deeper voices than do adult female humans, which is the direct result of higher levels of testosterone causing growth of the larynx. If the fossil records ofapes and humans alike show a trend toward decreasing larynx size in adult females and increasing larynx size in adult males, then