Question 4
every population of animals has an age structure, a graphical representation of the distribution of age groups within the population
while each individual in a population has a specific age, individuals themselves do not have an age structure. age structure is
therefore an example of a property.

Which describes how weathering and erosion are different? weathering is caused by water. erosion is caused by wind and ice. erosion transports sediments. weathering is a natural process.

Next pretest: evolution select the correct answer in a laboratory population of flies, the female flies are gray and the males are yellowish gray. biologists observed that all the male flies had an equal chance for reproduction, but the male flies with the brightest colors were more likely to successfully reproduce. what phenomenon could explain such a change? a sexual selection b. disruptive selection c. stabilizing selection d. directional selection

Identify the examples in which sam interacts only with natural resources