During meiosis, homologous chromosomes exchange genetic material during a process called crossing-over. This exchange of genetic material -

A. Reduces the diploid number to the haploid number

B. Increases the genetic variation

C. Reduces the probability of mutations

D. Increases the haploid number to the diploid number

Which of these statements best describes the st. lawrence seaway? the st. lawrence seaway connects the st. lawrence river with the arctic ocean. the st. lawrence seaway provides an important trading route between the u.s. and mexico. the st. lawrence seaway provides an important trading route for the u.s, but has little value for canada. the st. lawrence seaway connects the great lakes, the st. lawrence river, and the atlantic ocean.

The cluster of developing cells from conception until birth is called an

Match the functions to the cell types ? contraction and relaxation. conducting electrochemical signals fighting diseases carrying genetic material