Question

question 1 (2 points) a species of bird originally lived across a large, connected forest. over time, a river divided the forest into two separate regions, and the bird populations became isolated. after many generations, researchers discovered that the birds on either side of the river had developed different beak shapes, adapted to the food available in each region. which of the following best explains how selection led to these physical adaptations? a. the birds on each side of the river adapted to the different food sources in their respective environments, leading to the evolution of distinct beak shapes. b. the isolation forced the birds to migrate to new environments, where they developed physical traits similar to other species in those areas. c. the birds on both sides of the river were exposed to identical environmental conditions, so their physical traits remained unchanged. the isolation caused the birds to stop reproducing, and random mutations led to the development of new beak shapes over time. question 2 (2 points) what is one reason physical adaptations in animals may develop over time when a population becomes isolated from others? a. to reduce their need for food and begin to generate energy from the sun b. to help them survive better in their unique environment c. to increase the size of their population and better their chances of survival d. to avoid competition with other species so they will have more food

Explanation:

For Question 1, the birds on either side of the river adapted to different food sources due to isolation, leading to distinct beak - shapes. This is a classic example of adaptation to available food resources. For Question 2, when a population becomes isolated, physical adaptations may develop over time to help them survive better in their unique environment as they are no longer in contact with other populations and have to adapt to local conditions.

Answer:

Question 1: The birds on each side of the river adapted to the different food sources in their respective environments, leading to the distinct beak shapes.
Question 2: To help them survive better in their unique environment.