Choose the answer that best describes Allopatric Speciation. evolution that occurs when populations are separated by behavioral traits. O All of these answers are true evolution that occurs when populations are separated by geographic or physical barriers. O evolution that occurs when populations live in different habitats or exploit different niches.

What causes variation among a population of living things and  How can variation in one generation influence the next generation? Is the  variation in a population will be examined as the “raw material” upon which natural selection acts.  Why are there so many different kinds of living things? Comparing species that exist today reveals a lot about their relationships to one another and provides evidence of common origins. This session explores the theory of evolution: change in species over time.

. What is adaptive radiation? Explain it with the example of Darwin's finches.

Which of the following factors are associated with higher rates of speciation? (select all that apply) O More specialization of diet Flower pollination by wind V A mating system with elaborate courtship and highly selective mating decisions O The ability to efficiently travel long distances Being a vertebrate living in a terrestrial environment

Imagine that you are an evolutionary biologist currenyly studying a particular species of snake on an island off the coast of Durban, South Africa and that you have information indicating that1000 years ago, the same species of snakes in that island was observed to exist in a variety of colours (Red blue,yellow green) and that most of the snakes were blue. This same species of snakes and the same mixof colours were also found on the mainland (i.e Kwazulu Natal)  Assuming that all the snakes are descended from an ancestral blue snake, explain this change in colour frequency (evolution) as though it were based solely on each of the following processes.  a. Natural selection  b. Bottleneck effect  c. Founder effect

In the model shown below, discuss what kind of geographic barriers would have led to the finch speciation in the Galapag

Can you please help answer this question?

Choose True for yes and False for no, for each of the statements 1) If fossil evidence of the most recent common ancestor of A and B (10 million years ago) was found on both sides of the river (that formed 20 million years ago), then the distribution of A and B is best explained by vicariance. True or false 2) Is It possible that species C will speciate ? True or false

LO Two species of fish, known as three-spined stickleback, live in a single lake in British Columbia. They are closely related but occupy different habitats within the lake. They exist nowhere else. These species most likely arose by sympatric speciation from a single species of three-spined stickleback. True False

Which of the following statements is true? Select one: O a Natural selection selects against those traits of an organism that bring it into a better adaptive relationship with its environment. Ob Natural selection favors those traits of an organism that bring it into a better adaptive relationship with its environment. Which of the following is not required for speciation to occur? Select one O a time Ob niche Oc. interbreeding Od genetic isolation