What is the main source of energy for all living organism

According to the periodic table how many electrons does bromine (#35) have in its valence level?

Water has special characteristics because of the nature of hydrogen bonds. what are they?

16. There are 46 chromosomes in human somatic cells, but only 23 chromosomes in human sex cells. Explain what would happen if the chromosome number is not reduced before sexual reproduction:

Dr. o is playing in her garden again. she needs 1 kg of potting soil for her plants. she has 750g. how much more does she need?

In grafting, the plant with the root system is called the scion rootstock cutting, and the portion of the plant with the buds is called the rootstock scion cutting.

In RNA molecules adenine is complementary to

Why is anti-bacterial items and hand sanitizer bad for normal flora?

If Venus has an atmosphere, why doesn't it support the kind of life that is now found on earth?

What cell part stores material within the cell?

How do sieve tube member (stm) cells differ from tracheids? stm cells function as living cells; tracheids function as dead cells stm cells lack a companion cell; tracheids have a companion cell stm cells occur in angiosperms;