Question

friends i want extra question of cell, micro organism, metal and non metal f,force and pressure,friction plzzzz give me

Answer 1

what did tissue made up of
and: cells

Answer 2

Question 1. Fill in the gaps in the following table illustrating differences between prokaryotic and eukaryotic cells.

Answer:

Question 1. Can you name the two organelles we have studied that contain their own genetic material?

Answer: The two organelles which have their own genetic material are:

1. Mitochondria 2. Plastids

Question 2. If the organisation of a cell is destroyed due to some physical or chemical influence, what will happen?

Answer: The cell will not be able to revive and lysosomes will digest it.

Question 3. Why are lysosomes known as suicide hags?

Answer: When the cell gets damaged, lysosomes may burst, and the enzymes digest their own cell. Therefore lysosomes are known as suicide bags.

Question 4. Where are proteins synthesised inside the cell?

Answer: The proteins are synthesised in the ribosomes that are also known as protein factories.

Question 1. Make a comparison and write down ways in which plant cells are also different from animal cells.

Answer:

NCERT Solutions For Class 9 Science Chapter 5 The Fundamental Unit of Life 2 Question 2. How is prokaryotic cell different from a eukaryotic cell?

Answer: Prokaryotic cell is generally smaller in size (1-10 pm), nuclear region is poorly defined, the cell organelles are not membrane-bound and has a single chromosome.

Eukaryotic cell is generally larger in size (5-100 pm), nuclear region is well defined with nuclear membrane. Membrane-bound cell organelles are present and has more than one chromosome.

 

Question 3. What would happen if the plasma membrane ruptures or breaks down?

Answer: If plasma membrane ruptures or breaks down then molecules of some substances will freely move in and out.

Question 4. What would happen to the life of a cell if there was no Golgi apparatus?

Answer: Golgi apparatus has the function of storage, modification and packaging of the products in vesicles. If there were no Golgi bodies, packaging and dispatching of materials synthesised by the cell will be stocked.

Question 5. Which organelle is known as the powerhouse of the cell? Why?

Answer: Mitochondria is known as powerhouse of the cell because it releases the energy required for different activities of life.

Question 6. Where do the lipids and proteins constituting the cell membrane get synthesised?

Answer: Lipids and proteins are synthesised in ER [Endoplasmic Reticulum].

Question 7. How does Amoeba obtain it’s food?

Answer: Amoeba take it’s food by the cell membrane which forms the food vacuole.

NCERT Solutions For Class 9 Science Chapter 5 The Fundamental Unit of Life 3

 

Question 8. What is osmosis?

Answer: Osmosis is the process of movement of water molecule from a region of higher water concentration through a semi-permeable membrane to a region of lower water concentration.

Question 9. Carry out the following osmosis experiment:

Take four peeled potato halves and scoop each one out to make potato cups, one of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water.

Now,

(a) Keep cup A empty

(b) Put one teaspoon sugar in cup B

(c) Put one teaspoon salt in cup C ‘

(d) Put one teaspoon sugar in the boiled potato cup D

Keep these for two hours. Then observe the four potat