Astronomers use light years to measure distances in space because space is so massive and distances so far that conventional numbering is inadequate and unmanageable. One light year is a distance measurement equivalent to six trillion miles.
Answer:
Active transport often takes place in the internal lining of the small intestine.
Explanation:
Sex is a reproduction system involving both male and female to partake in sexual activity intercourse to create an offspring between the two beings creating a living organism
Answer:
The only haploid cells in humans (with 23 chromosomes and no matching pairs) are:
A. sperm and egg cells
Answer:
its c. lets molecules pass in and out....
