Answer:
Plant cells contain chloroplasts since they need to perform photosynthesis, but animal cells do not.
Explanation:
animal cells do not have a cell wall or chloroplasts but plant cells do. Animal cells are mostly round and irregular in shape while plant cells have fixed, rectangular shapes.
The fatty substance that insulates and protects the axon is myelin sheath. That is option D.
<h3>The nerve cells (neuron)</h3>
The nervous system is made up of nerve cells that helps to send and receive signals that are interpreted by the brain.
The parts of the nerve cell include the following:
The axon is part of the nerve cell that transmits electrical signals. it is surrounded by myelin sheath.
The myelin sheath is a fatty layer that insulates the axon and helps it transmit signals over long distances.
Therefore, the fatty substance that insulates and protects the axon is myelin sheath.
Learn more about neurons here:
brainly.com/question/13061744
The correct answer is:
(D) enzyme linked receptor
When non-nerve cells become involved in response to signals, the type of receptor that goes into action is the enzyme linked receptor.
Explanation:
An enzyme-linked receptor, also identified as a catalytic receptor, is a trans -membrane receptor, where the adhesive of an extracellular ligand produces an enzymatic action on the intracellular side. Hence a catalytic receptor is an integral membrane protein containing both enzymatic catalytic and receptor functions.
Answer and explanation;
Carbon is so important in the formation of complicated molecules in that;
-Carbon can form up to four covalent bonds, and it can form reasonably strong bonds with nitrogen, oxygen, and other different types of atoms.
-Carbon also has an almost unique ability to form long chains with <span>C−C</span> linkages, and along the chain there can be regions of different reactivity.<span>
Also </span><span>C−C</span><span> bond is unaffected by water, and therefore, if for example a cell, can be isolated from the aqueous medium.</span>
That will be once every year
