Which adaptation is not an example of a structural adaptation?
needles on a porcupine
thick bark
needles on a cactus
a bear hibernating

During sunny hours, a large amount of build up between the hours of 1: 00-5: 00 pm. a. ozone b. mercury c. lead d. sulfuric acid

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

What part of the brain is highlighted in the diagram below?