It carries signals for the body through nerves (answer 3)
I believe the answer to your question is isokinetic, isometric, and isotonic
Inhale and exhale because you inhale the oxygen and exhale the carbon dioxide
Leafs do photosythesis because leafs absorb blue and red light and reflect green just an aditional fact for ya
A dominant trait can be shown both when an organism is homozygous dominant AND heterozygous. Two different genotypes give the same visible result so a testcross is needed to be able to accurately say if the organism is homozygous dominant or heterozygous
