Which component of a cell do humans purposely change for the benefit of society? 1. cytoplasm
2. ribosomes
3. cell membrane
4. genes

help me obi wan, your my only hope!

Plzz hurry im being timed during times of vigorous physical activity, muscles require a constant supply of oxygen. how does the body respond to these needs? a. breathing rate and heart rate both decrease. b. breathing rate and heart rate both increase. c. heart rate decreases, but breathing rate remains stable. d. breathing rate increases, but heart rate remains stable.

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

Explain the physiological changes that occur when the hypothalamus stimulates the sympathetic nervous system. you can make a flowchart or a simple step process. be sure to include all chemicals/hormones secreted, glands involved and the functions of each chemical/hormone.