Answer:
Explanation:
The structure of the two endoplasmic reticulum makes the difference.
Endoplasmic reticulum (ER) is located in the cytoplasm membrane in the eukaryotes and its divided into two the rough and smooth endoplasmic reticulum.
Rough ER has ribosomes which gives it the name rough because of its appearance. The ribosomes on rough ER helps it to specialize in the synthesis of proteins. proteins in a cell, are synthesize by it. The smooth endoplasmic reticulum lacks ribosome in its structure and cannot synthesize protein but lipids.
Answer: Option A) nucleus
Explanation:
Prokaryotic cells lack nuclear envelope, thus the nucleus is absent in Prokaryotic cells.
On the other hand, eukaryotic cells possess membrane bound nucleus and nuclear envelope.
Thus, nucleus is the answer
Answer: The word X represents the organs which is no longer used by the species.
Explanation:
The word vestigial shows the characters that is not used by the species anymore. Example is appendix which is considered as a vestigial organ in human beings as it is no longer useful for the human body.
This organ was used when there was only vegetarian food available for the human beings to eat.
But now that animals and vegetable both are available there is no need for the enzyme required the digestion of cellulose.
So, this organ is vestigial for the human body.
Some organic methods of adding nitrogen to the soil include: Adding composted manure to the soil. ... Planting nitrogen fixing plants like peas or beans. Adding coffee grounds to the soil
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