The correct answer is: DNA polymerase is a directional enzyme that synthesizes leading and lagging strands during replication
DNA polymerase is an enzyme that synthesizes DNA during the DNA replication by adds nucleotides to the 3’ end of a primer. This means that the new chain is formed in a 5’ → 3’ direction.
Because double-stranded DNA is antiparallel, DNA polymerase moves in opposite directions on the two strands-leading and lagging strand.
The leading strand is copied continuously since DNA polymerase is moving towards the replication fork. The lagging strand is copied discontinuous. DNA polymerase is moving away from the replication fork (and helicase that separates the strands), so it must constantly return to copy newly separated stretches of DNA. So, the lagging strand is copied as a series of short fragments-Okazaki fragments that are joined together by a combination of DNA pol I and DNA ligase.
Answer:
<u>Both of these are necessary to maintain overpopulation of any species in an ecosystem.</u>
Explanation:
- Predation is an act in which one organism eats another organism present in the ecosystem.
- The one eaten is called prey, while the dominant organism is called Predator.
- Since an ecosystem is made up of many organisms along with the natural resources present in it.
- This gives rise to different species competing against one another.
- If one of these species is at a certain advantage, their population will rise uncontrollably hence to prevent this a predator plays a major role.
- On the other hand, competition is a term which describes the harm caused to two different organisms.
- This is due to the limited number of natural resources like food, water or shelter etc.
- Organisms who are less likely to adapt according to the changing environment ultimately die.
- For example, Plant roots over time lessen the amount of nitrogen present in the soil, causing the neighboring plant to die.
Explanation:
Wind is a renewable energy source. Overall, using wind to produce energy has fewer effects on the environment than many other energy sources. Wind turbines do not release emissions that can pollute the air or water (with rare exceptions), and they do not require water for cooling.
Low levels of estrogen is a sign that the ovaries of a woman are beginning to fail. This is a common occurrence when one is at menopausal stage. Estrogen and progesterone naturally decrease and eventually stops the menstrual cycle. Hope this helped.
Answer:
Yes.
Explanation:
Natural selection says that the weakest die off quicker and are less likely to reproduce. With only the fittest surviving and reproducing, Natural Selection ensures an increase in the populations mean fitness.
