<span>The answer to this question would be: keep blood moving forward through the heart
When the ventricle contracts, the valve will plug the hole to atrium so the blood will be pump to the body. The valve in heart will prevent backflow of blood from ventricle to atrium which makes the blood keep moving forward.
A defect in valve could reduce heart deficiency as a part of the blood might be going back to the atrium, called regurgitation.</span>
Answer:
Crossing over
Explanation:
Prokaryotic cells are cells that do not possess a membrane bound nucleus to house their genetic material e.g bacteria while eukaryotic cells possess a membrane bound nucleus that houses their genetic material e.g plants.
One important characteristics of prokaryotic cells is that they do not undergo any form of sexual reproduction, hence, cannot undergo MEIOSIS, which only occurs in sexual reproducing organisms. Prokaryotes reproduce asexually by binary fission.
Crossing over is a unique process that only occurs during meiosis. Since prokaryotic cells do not undergo meiosis, this means that crossing over is the difference between prokaryotic cells and eukaryotic cells in this question.
classify the materials that undergo decay. write decay and non-decay in the space provided for 2) stick
Answer:
Explanation:
The cell membrane consists primarily of a thin layer of amphipathic phospholipids that spontaneously arrange so that the hydrophobic "tail" regions are isolated from the surrounding water while the hydrophilic "head" regions interact with the intracellular (cytosolic) and extracellular faces of the resulting bilayer.
Answer: early embryological development
Explanation: