Answer:
The two strands of DNA are replicated in different ways
Explanation:
DNA replication is a process that occurs during the S phase of the cell cycle that consists of making two identical copies of the double-stranded DNA molecule, which subsequently are distributed in the daughter cells during cell division. During this process, DNA polymerase can add nucleotides in 5' to 3' direction, but not in 3' to 5' direction. In consequence, the DNA strand that has 3’ to 5’ directionality can be synthesized directly, while the DNA template strand that has 5’ to 3’ directionality can't be synthesized in a continuous manner and thereby it is created by adding small DNA fragments, which are known as Okazaki fragments (150-200 nucleotides in size).
Answer:
It depends on the fish (I do not see any pictures) Any fish is an example of natural selection.
Explanation:
A good example would be that polar bears grew and evolved to have white fur to blend in the snow to sneak upon prey. However, their brown bear counterparts failed to do that. So due to better camouflage and hunting technique, the polar bears survived more up north.
The correct option is A.
A lot of biochemical reactions occur per minute inside living cells and these reactions have to be sustained because the survival of living cells depend on them. For these reactions to proceed, energy is needed. This energy is usually obtained from the food which a living organism consumed. The mitochondria, which is the power house of the cell, is the one which convert the energy to the ATP form, which is usable by the cells.
Answer:
Stimulate an immune response
Explanation:
The vaccine is a preparation that contains a weakened or killed form of microorganism (or part of them) that stimulates the immune system to produce memory antibodies to recognize that microorganism in the future. After the body produces the memory antibodies, if a person is in contact with that microorganism the body recognized them as “strange” and the body response to killing them is faster before the infection. In some cases is necessary to apply various doses of the vaccine in a certain time to maintain the memory antibodies.
