It impacts aquatic ecosystems and can damage the habitats of aquatic animals by blocking off their food sources with dams and the dams can interfere with mating patterns, hydroelectricity also can damage the flora and fauna by floods drowning and killing various animals and plant life and it can lead to the emissions of greenhouse gasses causing air pollution. I hope this helps.
The cell wall is a tough and rigid layer that surrounds some types of cells. It is located outside the cell membrane and its main function is to provide rigidity, strength, protection against mechanical stress and infection. It can also provide the cell with limited plasticity that will prevent the cell from rupturing due to turgor pressure.
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
improved soil fertility
Explanation:
One of the direct effect of biodiversity is improved soil fertility. Biodiversity deals with variations in life inhabiting a particular area.
- A typical soil is made up of water, air, organic matter and minerals.
- Organic matter is the component of soil that deals with remains of organisms in soils.
- This component is important to the soil.
- The more diverse an ecosystem is, the richer its organic matter component.
- This eventually tells on the fertility of the soil.
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The structures of prokaryotic and eukaryotic cells affects their function as prokaryotic cell has simpler structure that enables it to perform all the basic life processes but complex functions like multicellularity cannot be achieved by prokaryotes. Eukaryotic cells have complex structures and hence can perform several functions unlike the prokaryotes.
Prokaryotic cell is the primitive type of cell that do not posses a true nucleus. They also do not contain any cell organelles. The ribosome type present in prokaryotes is 70S.
Eukaryotic cell is the advanced cell that possesses a true nucleus and all the cell organelles like mitochondria, chloroplast, golgi body, etc. Eukaryotic cells can even form multicellular structures and perform sexual reproduction, unlike prokaryotic cell.
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