Down's syndrome is a condition where an extra chromosome is produced on the chromosome.
12th
16th
21st
23rd

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

In one or two well-crafted paragraphs in your laboratory journal, summarize the process in which normal cells become cancer cells. your paragraph(s) must include each of the terms listed below. underline each term in your writing:

The mixture of sperm and fluids from the seminal vesicles, prostate gland, and cowper's glands is called