Answer:
b) Channel pumps
Explanation:
The channels are the transmembrane proteins that serve in the passive transport of substances down the concentration gradient. The channels can be gated or non-gated. The gated channels are opened and closed in response to certain stimuli such as electrical change.
For example, aquaporins are the gated water channels that transport the water across the plasma membrane. The process is driven by the osmotic gradient and does not use the energy of ATP.
People's daily experiences can contribute to their belief that earth/ species do not change because we are changing with it as it is happening. Also the changes happen gradually so you can't constantly see to believe it.
Answer:
Explanation:
A number of things/people that populate on place
It consists of one specie instead of many specie
