Peticide and because global warming
Autotrophs are the producers in the food chain, meaning they create their own nutrients and energy. Kelp, like most autotrophs, creates energy through a process called photosynthesis. An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals
During longer space exploration trips, all of the medical concerns are due to the absence of gravitational force. Crewmembers may develop short-term conditions which are reversible. Those conditions include: vision impairment risks and short-term cardiac atrophy, increase in length, weight loss, vestibular dysfunction etc.
On the other side, the long-term medical condition is loss of bone mineral density (negative calcium balance) and radiation exposure which are irreversible.
Answer:
Cells are the smallest unit of life. All living things are made of cells. Your whole body is made up of different kinds of cells, each with a different job to do.