A decrease in tenperature could result in birds relying more on feeders to get food.
Depends on what type of teeth
if carnivore teeth than they can be similar by both being sharp and used to test through meat but could possibly be different size.
or herbivore teeth. can be both a the shape of your front teeth and be different by shape.
or omnivore teeth. can be different by the sharp and dull teeth. like in your mouth.
The correct answer is: Individuals that produce chemical compounds are better protected from herbivores and are able to produce more young than individuals that do not produce the compounds.
Natural selection acts on variations-differences in phenotype that exist among individuals. If a certain trait contribute more to survival and reproduction (individuals with that variant survive more than individuals with other variant), natural selection will favor that trait. In this case, production of chemical compounds is favored over non-producing trait.
The correct answers are 1, 2 and 4
