I. Answer the following questions in detail:
animal cell?
3. What are totipotent cells?
4. What are organelles? Explain the structure and
function of endoplasmic reticulum.
5. Define the terms 'protoplasm, cytoplasm' and
‘nucleoplasm
6. What is meant by the term cell division? Why is cell
division necessary?
HOTS
1. What are the differences between plant cell and
2. Explain the ways in which the shape of a cell varies
Answers
Answer : 1)Animal cells are the basic unit of life in organisms of the kingdom Animalia. They are eukaryotic cells, meaning that they have a true nucleus and specialized structures called organelles that carry out different functions.
3) A totipotent cell is a single cell that can give rise to a new organism, given appropriate maternal support (most stringent definition) A totipotent cell is one that can give rise to all extraembryonic tissues, plus all tissues of the body and the germline .
4)Organelles are small, specialized structures in cells which operate like organs by carrying out specific tasks.Endoplasmic reticulum (ER), in biology, a continuous membrane system that forms a series of flattened sacs within the cytoplasm of eukaryotic cells and serves multiple functions, being important particularly in the synthesis, folding, modification, and transport of proteins .
5) 1) Protoplasm:Protoplasm is the living part of a cell that is surrounded by a plasma membrane.
2) Cytoplasm : Cytoplasm is a thick solution that fills each cell and is enclosed by the cell membrane.
3) Nucleoplasm : the substance of a cell nucleus, especially that not forming part of a nucleolus.
6) Cell division serves as a means of reproduction in unicellular organisms through binary fission. ... For growth to occur in living organisms, the number of cells have to increase through cell division until it reaches its maximum size. The human body also repairs injuries by means of cell division.
HOTS
1) ANS Specify your question.
2)Ans Different types of cells have different shape-shifting capabilities, depending on the specific function of that cell in the organism. Three general factors determine cell shape: the state of the cytoskeleton, the amount of water that is pumped into a cell, and the state of the cell wall.