Crossing over shuffles alleles on:.a. sister chromatids. b. different non-homologous chromosomes. c. chromosomes within different cells. d. different homologous chromosomes. d. none of the answers are correct.

d

Explanation:

Crossing over shuffles alleles on non-sister chromatids of homologous chromosomes.

At the prophase I stage of meiosis, homologous chromosomes synapsed to form a four-chromatid structure known as tetrad. Exchange of chromosomal segments between non-sister chromatids of the tetrad then takes place, a process that results in the reshuffling of genes or alleles on the non-sister chromatids.

Hence, none of the answers is correct.

Correct option: d

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a