During sperm penetration, human eggs are still surrounded by follicular cells.
Therefore, the correct answer is Option D.
<h3>What changes does egg undergo for fertilization?</h3>
- An egg goes through a few changes at the hour of sperm penetration during fertilization.
- These progressions happen at the cell surface, in development, physiology and gene expression.
- For fertilization, a sperm should combine with the cell membrane and afterward infiltrate the egg cells.
- Infiltration through the egg cell or extracellular matrix (ECM) is a troublesome task.
- The acrosome of the egg goes through acrosomal reaction to get through the hard shell of cell.
- To go through the follicle cells encompassing the egg or oocyte, the sperm discharges hyaluronidase enzyme.
- This chemical isn't delivered until the sperm comes into contact with the egg cell's zona pellucida.
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Any change in the climate of an area can affect the plants.Climate change not only affects ecosystems and species.An ecosystem refers to the animals, plants, and, Because of their sensitivity to hot temperatures.
<span>Answer:
It allows most of the blood from the right ventricle to bypass the fetus's fluid-filled non-functioning lungs. Upon closure at birth, it becomes the ligamentum arteriosum. There are two other fetal shunts, the ductus venosus and the foramen ovale.</span>
Answer:
The relationship between both bacteria is Mutualism.
Explanation:
There are different ecological interactions between living organisms, depending on the benefits or harms that one or both species can receive as a result of their interaction. In this case, we talk about two bacteria that live on the surface of the Mixotricha paradoxa protist. These two bacteria have well-defined functions, <u>one is responsible for locomotion and the other for the generation of energy in the form of ATP</u>. In this interaction both organisms obtain benefits. When two organisms take mutual benefit from their interaction, it is called mutualism.
Other kinds of interactions are:
-Commensalism: An interaction that benefits an organism and the other organism is neither benefited nor harmed.
-Parasitism: One organism parasites the other to feed, causing damage to its host.
-Amensalism: One organism harms another without any benefit received.