The source of genetic variation that occurs during meiosis and results in new combinations of alleles is known as

A.

genetic recombination

B.

genetic drift

C.

gene flow

D.

natural selection

Genes for traits are found on A. the cell membrane B. chromosomes

Why is the nucleus considered the command center of the cell? It contains the genetic instructions for every function of the cell. It is the cell's powerhouse and processes energy for the cell.

What has the greatest effect on the current decline of biodiversity? a. plants b. animals c. humans d. natural environment user: why would there be a concern with glaciers melting because of global warming? a.

The amino acid sequence of cytochrome c is exactly the same in humans and chimpanzees. There is a difference of 13 amino acids between the cytochrome c of humans and dogs, and a difference of 20 amino acids between the cytochrome c of humans and

Explain why a pot plant will soon start to visit when it is kept in a sunny window sill.

In the ocean, small remora fish are often found cleaning bacteria and other parasites from the mouths and gills of swordfish. Which of the following phrases best explains this interaction? A. animal affecting the life of an animal B.

Why do you think it is so difficult to control the spread of invasive species?

Suppose four different species live in close proximity to one another within an ecosystem. Species W reproduces through fragmentation. Species X reproduces sexually. Species Y reproduces through budding. Species Z reproduces through fission.

A carcinogenic mutation is not inheritable. What could be the reason for this? A. It occurs in germ cells and can be passed on to descendants during reproduction. B. The mutations could be treated by chemotherapy. C.

Explain why different surfaces have different albedos.