A natural satellite or moon is, in the most common usage, an astronomical body that orbits a planet or minor planet. In the Solar System there are six planetary satellite systems containing 185 known natural satellites.
Human sperm and eggs contain 23 chromosomes. Human zygotes contain 46<span> chromosomes. The type of cell division that produces gametes with half the normal chromosome number is called meiosis. It is used to produce cells for repair and asexual reproduction.</span>
No. Look up what a notochord is, vertebrates cannot have a notochord during embryonic development, as all nutrients flow into the blood stream, or stomach. Notochords are in between the mouth, and stomach. Which would NOT be used during development
D. Plants preform both photosynthesis and cellular respiration.
Please correct me if I'm wrong!! :)
