, is a form of asexual reproduction<span> and cell division </span><span>used by all poekaryotes</span><span> (bacteria and archaebacteria) and some organelles within eukaryotic</span><span> organisms.</span>
Answer:
Ca2+ channels closed, Ca2+ pumps operating slowly: a, c, f
Ca2+ channels open: b, e, h
Ca2+ channels closed, Ca2+ pumps operating rapidly: d, g
Explanation:
Experimental technique: Tracking cytoplasmic Ca2+ distribution after a sperm enters the egg Based on what they knew about the fertilization envelope (a protective layer that forms around the egg when a sperm fuses with it), Steinhardt, Shatten, and their colleagues hypothesized that changes in the distribution of Ca2+ ions in sea urchin eggs are involved in the formation of the fertilization envelope. In sea urchin eggs (as in most eukaryotic cells) the concentration of Ca2+ ions is much higher in the endoplasmic reticulum (ER) than in the cytoplasm. To see how cytoplasmic Ca2+ concentration changes in the egg during fertilization, the researchers injected a Ca2+-specific fluorescent dye into the cytoplasm of unfertilized eggs. After adding sperm to the eggs, they observed the eggs with a fluorescence microscope. The following images show the changes in fluorescence that occurred after a single sperm entered the egg. The fluorescence of the dye increased with increasing cytoplasmic Ca2+ concentration. The green color indicates the region of the cell with the highest fluorescence at that point in time.
Sort the labeled regions of the fertilized egg above based on the status of the ER Ca2+ channels and Ca2+ pumps in that region.
Check the diagram attached.It includes the labeled region
Answer:
Animal cells would not have the materials needed to produce energy in cellular respiration.
Explanation:
Answer:
Mitochondrial cells are present in more abundance.
Explanation:
Sperm cell require more energy because they need to travel to ovum through vaginal tract to initiate the process of fertilization which requires a supply of energy.