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;
-Neurotransmitters.
One of the first key terms she memorizes is neurotransmitters because these are the chemicals via which neurons communicate with each other.
Explanation;
-Neurons communicate with each other via electrical events called 'action potentials' and chemical neurotransmitters. At the junction between two neurons (synapse), an action potential causes neuron A to release a chemical neurotransmitter.
-Neurons are connected to each other through synapses, sites where signals are transmitted in the form of chemical messengers.
Answer:
The correct answer is one strand of each new molecule comes from the original molecule.
Explanation:
DNA replication is process by which the parental DNA is converted into two daughter DNA molecule.DNA replication is semi conservative in nature which means each newly synthesized daughter DNA molecule contain 50% parental DNA characteristics.
Each newly synthesizd daughter DNA molecule contain one parental strand and one newly synthesized strand..Thus half of the characteristics of parental DNA is being conserved in each newly formed daughter DNA molecule.
It is known as Tower Triangulation. Hope this helps! :)
Answer:
The answer is A
Explanation:
Since their variations are best suited for the environment, they have a higher chance of surviving.
