Answer: Option D: Neuromuscular junction
Explanation:
This is the site of transmission of chemical signal also known as a chemical synapse between a neuron and a muscle fibre. Most of the time the chemical released which is a neurotransmitter is acetylcholine. When released, it stimulates the release of calcuim ions present in the sarcoplasm: an endoplasm like structure in the muscle fiber that contains calcium ions.
Answer:
Ideal cell is defined to be the cell will zero internal resistance.
The correct answer is: They usually have one or more helical regions spanning the membrane bilayer
Transmembrane proteins are type of integral proteins meaning that they are permanently attached to biological membrane. Transmembrane proteins span through the plasma membrane so most of their structure is hydrophobic.
The major role of these proteins is transport role: they act as a channels that undergo conformational change in order to move a substance through the membrane.
Classified by their structure they can be put into two types: alpha helical and beta barrels.
The answer is common ancestor.
Since these two organisms are adapted to different environments and still have structural similarities, that means that they must have a common ancestor. Common ancestor is an ancestral organism that two or more descendant lineages have in common.
Answer:
The correct option is <u><em>D) These advancements are very expensive and not available to everyone.</em></u>
Explanation:
Consider the statement A. It states that the new technological advances uses renewable sources of energy. This is a positive aspect as the energy can be renewed and replaced. The corn from which this energy is derived can be produced over and over again. Hence, this is a positive aspect, not a negative aspect.
Consider statement B. This statement tells us that the new technological advances will not result in warming the Earth's atmosphere by greenhouse effect. Hence, it is a positive aspect.
Consider statement C. It states that the new technological advances will lead to lesser pollution. Hence, it is a positive aspect.
<u><em>Now, consider statement D. It is a drawback because technological advances are too expensive to be used by many people. Hence, it is a negative aspect.</em></u>