Jezelyn needs to create a project that shows reproductive isolation in action and decides to make a video. which of the following would make the best project?
1. a video that shows a large river that has penguin populations on both sides
2. a video that shows penguin species that have different mating dances
3. a video that shows a penguin that is laying eggs
4. a video that shows penguins in a tidal pool and an open ocean

1. a video that shows a large river that has penguin populations on both sides.

Explanation:

Reproductive isolation is a phenomena which occurs when members of the same species becomes separated due to a geographical, physical or behavioral barrier. The members of the same species after separation adapt to changes and this is the basis of speciation or development of new species.

Option 1 is the correct option as the river is the geographical barrier, between the two separated penguin populations.

answer: after carbon dioxide enters the leaf through stomata it moves into the mesophyll cells where photosynthesis occurs and glucose is constructed. respiration occurs when glucose (sugar produced during photosynthesis) combines with oxygen to produce useable cellular energy.

explanation:

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).