All of Darwin’s observations would prove this theory true.
A nucleotide is made up of a base, a sugar and a phosphate group.
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.
Answer:
False
Explanation:
Action potential will only be fired when the memebrane potential is above the threshold level.
This follows the all-none -principle.
No matter the strenght of stimulus if the magnitride is not upto the threshold level,No action potential will.be generated.
An example is the flushing of water closet or lavoratory.No mater one tried to flush,if the water in the closet does not fill up to the threshold for flushing,,to propel flushing. not flushing will take place.
Answer:
Explanation:
Several conclusions can be drawn from this observation;
1. The adaptation for fur colour in the mice from both location was similar, this could be because both environments have almost similar conditions.
2. It is also an indication that the dark fur colour may have evolved independently in both populations.
3. Two completely different mutations in two separate genes can generate the same phenotype.
