Question

CLASS 9 BIOLOGY

WORKSHEET 2

I Fill in the blanks:

1. Transporting channel of the cell is……………….

2. Chromosomes are made up of …………….. and……..

3. The infolding of mitochondria is known as …………….

4. Storage sac of the cell is…………………..

5. Non-membranous organelle of cell is…………….

6. Smallest cell in human is………………..

7. …………………….is the full form of DNA.

8. ATP stands for…………………..

9. Cells which change their shapes are……………. and……………….

10.Largest cell in the world is…………………

II. Write the functions of following:

a) Areolar tissue

b) Lymph

c) Golgi bodies

d) Nucleus

e) Protective tissue in plants

III. Differentiate between

a) Nuclear region of bacterial cell and nuclear region of animal cell

b) Cork and epidermis

c) Osmosis and diffusion

d) Chromatin and chromosome

e) Cells of meristematic tissue and cells of permanent tissue

f) Bone and cartilage

IV. Describe:

a) Membrane biogenesis and its significance

b) Plasmolysis​

Answer 1

Answer:

so long question...............................

Answer 2

Answer:

I Fill in the blanks:

1. Endoplasmic reticulum

2. protein, a single molecule of DNA

3. cristae

4. Vacuoles

5. cytoskeleton

6. sperm

7. Deoxyribonucleic acid

8. adenosine triphosphate

9. WBCs, amoeba

10. Caulerpa taxifolia

II. Write the functions of following:

a) Areolar tissue  - Areolar connective tissue holds organs in place and attaches epithelial tissue to other underlying tissues. It also serves as a reservoir of water and salts for surrounding tissues.

b) Lymph  - They include protecting your body from illness-causing invaders, maintaining body fluid levels, absorbing digestive tract fats and removing cellular waste.

c) Golgi bodies  - It helps process and package proteins and lipid molecules, especially proteins destined to be exported from the cell.

d) Nucleus  - As it contains genetic material, it coordinates cell activities like protein synthesis and cell division.

e) Protective tissue in plants - They prevent desiccation, mechanical injury, and infection in plants.

III. Differentiate between

a) Nuclear region of bacteria :

• They are void of any membrane
• They have free RNA and nucleic acid

Nuclear region of animal cell :

• They have well bounded membrane
• They have proper nucleus

b) Epidermis:

• Epidermal cells cover the entire plant body during primary growth.
• They occur as a single layer of cells.

Cork:

• Cork cells cover the stem and root of the plant after the secondary growth of the plant.
• Cork cells originate from the cork cambium.

c) Osmosis:

• Osmosis is the movement of solvent particles across a semipermeable membrane from a dilute solution into a concentrated solution
• Osmosis always occurs across a semipermeable membrane.

Diffusion:

• Diffusion is the movement of particles from an area of higher concentration  to lower concentration.
• Diffusion can occur in any mixture, including one that includes a semipermeable