Question

2) Cell wall
1) Nucleolus
3) Nucleus
4) Cytoplasm
MATHEMATICS
If x=(-1) + (- 1)2 + ..... + (-1)2019 and 1
y = (- 1)' - (- 1)2 + ..... + (- 1)2019, then
x-y is
1) 2019 2) 2018 3) 0 4) 1014
1​

Answer 1

Answer:

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Answer 2

Answer:

1. The nucleolus is the distinct structure present in the nucleus of eukaryotic cells. Primarily, it participates in assembling the ribosomes, alteration of transfer RNA and sensing cellular stress. The nucleolus is composed of RNA and proteins, which form around specific chromosomal regions.
2. A cell wall is a structural layer surrounding some types of cells, just outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides the cell with both structural support and protection, and also acts as a filtering mechanism.
3. The nucleus is a membrane-bound organelle that contains genetic material (DNA) of eukaryotic organisms. As such, it serves to maintain the integrity of the cell by facilitating transcription and replication processes. It's the largest organelle inside the cell taking up about a tenth of the entire cell volume.
4. Cytoplasm is a thick solution that fills each cell and is enclosed by the cell membrane. It is mainly composed of water, salts, and proteins. In eukaryotic cells, the cytoplasm includes all of the material inside the cell and outside of the nucleus.

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