The process of nitrogen fixation is an example of Biotic to Biotic
Abiotic to Biotic
Biotic to Abiotic
Abiotic to Abiotic

Which of the following is an advantage of using embryonic stem cells in medical research? a. the use of embryonic stem cells is much less expensive than the use of adult stem cells. o b. no living tissue is damaged when scientists use embryonic stem cells. o c. embryonic stem cells are able to differentiate into a wider range of cells than adult stem cells. d. there is no controversy surrounding the use of embryonic stem cells.

100 points and brainlest its 6th grade work compare the parts of a cell and the cell as a whole to another common nonliving system (i. e., a car, a city,

Which of the following would most directly interfere with sperm production? ingestion of a substance that mimicked inhibin interruption of sustentocytes' production of abp low sperm count use of synthetic steroids (testosterone)