Answer ASAP:
What happens when a muscle contracts?
A.) Calcium combines with ATP to produce sarcomeres.
B.)Calcium produces contractions.
C.)Myosin heads attach to and pull on a series of actin-binding sites.
D.)Actin produces myosin and ATP.

The idea that all living things are made up of cells is considered scientific law. this means the idea is an emerging scientific idea that has a logical explanation. has been tested with similar results at least twice. is supported by scientific consensus and a large amount of evidence. has been rejected only once by the scientific community

Parthenogenesis is a type of reproduction that does not require a mate. it’s rarely seen in birds and higher vertebrates. parthenogenesis involves the formation of a zygote. but this zygote is formed without fertilization. in parthenogenesis, in the absence of a male gamete, the ovum develops directly in the zygote.

What happens during the experiment stage of the scientific method