Though they are constantly changing, ecosystem are naturally BALANCED.
An ecosystem is said to be balanced, when the components of the ecosystem are in harmony. Two of the principal processes that usually throw ecosystems out of balance is pollution and hunting.
When air is inhaled, oxygen diffuses from the alveoli into the blood to be used for respiration by the body’s cells. Carbon dioxide is a waste product made by the body’s cells during respiration.
The correct answer is B.
Channels and pumps are transmembrane proteins that create hydrophilic tunnels across the membrane. This allows molecules to be diffused through them. The channels and pumps are highly selective and only allow the diffusion of specific molecules. The channel's structure blocks the contact of the molecule with the head and tail of the phospholipids that form the membrane. As we said, the channels and pumps are proteins, so they are formed by amino acids. Therefore, the molecules passing through channels and pumps, only come in contact with the amino acids.
Plants have a cell wall composed of cellulose, chloroplasts, and a large central water-filled vacuole.
Answer:
see explanation
Explanation:
1. Vitamin B12
2. vitamin D3
3. Carnosine
4. Docosahexaenoic Acid (DHA)
