Cells

Q.

What are the structure and function of the cell?

Q.

Which among the following is the function of guard cells?

1. Opening and closing of stomata

2. Production of antioxidants

3. Transmission of spores

4. Protection

Q. (a) What is chlorophyll? What part does chlorophyll play in photosynthesis?

Q.

What cells have a lot of Mitochondria?

Q.

What is the meaning of an isodiametric cell?

Q.

Question 38
How do the guard cells regulate opening and closing of stomatal pores?

Q.

What is the smallest unit of life?

Q. Among the following which cell can be seen with an unaided eye?

1. Hen's egg
2. Nerve cell
3. Red blood cell
4. Sperm cell

Q.

A group of similar cells that are specialised to perform specific functions is called ___.

1. Cell system

2. Organ

3. Organ system

4. Tissue

Q.

Name the basic structural and functional unit of living beings.
[1 MARK]

Q.

Define tissues. 'Tissues exhibit division of labor'. Explain this statement with examples. [5 MARKS]

Q.

The process of cell death is known as___.

1. Apoptosis

2. Cell suicide

3. Cell sweeping

4. Cyclopsis

Q.

The structural and functional unit of organisms is a ___

Q. Which of the following scientists discovered cells in cork slices?

1. Carl Linnaeus
2. Antonie van Leeuwenhoek
3. Louis Pasteur
4. Robert Hooke

Q.

What is the role of mitochondria in ATP generation?

Q.

Among the following which is the most fundamental characteristic of all living organisms?

1. Presence of nucleus in their cells

2. Cell is the basic unit of life

3. Presence of a body skeleton

4. Their cells can do photosynthesis

Q. What is cell

Q. The shape and size of the cell depends upon the of the cell.

1. complexity
2. function
3. age

Q.

Which part of leaf is commonly used for preparing the slide of stomata?

Q.

Question 04(iv)
Indicate whether the following statements are True (T) or False (F).
A new organism develops from a cell called gamete. ( )

Q. Where is chlorophyll mainly present in a plant?

Q.

Guard cells are kidney-shaped cells that surround the stoma

1. True

2. False

Q.

Which of the following living organisms do not possess a circulatory system?

1. I and II

2. II

3. IV

4. II and IV

Q.

Question 29
The opening and closing of the stomatal pore depends upon

(a) Oxygen
(b) Temperature
(c) Water in the guard cells
(d) Concentration of ${\text{CO}}_2$ in stomata

Q. Which of the following describes tissues?

1. A group of cells
2. A cell with multiple nuclei
3. A cell without nucleus
4. A group of cells that function together

Q. The opening and closing of stomata depend on the following:

1. Concentration of oxygen in the atmosphere.
2. Temperature of the atmosphere.
3. Presence of water in guard cells.
4. Concentration of carbon dioxide in the atmosphere.

Q.

Find the correct sequence of the organisation that is observed in organisms.

1. Cell -> Tissue -> Organ system -> Organ -> Organism

2. Cell -> Tissue -> Organ -> Organ system -> Organism

3. Cell -> Organ -> Tissue -> Organ system -> Organism

4. Cell -> Organ -> Tissue -> Organ system -> Organism

Q.

There are living cells.But we know that cell is the basic unit of life.The independent living cell are called unicellular organisms.Ex-Amoeba.There are independent living tissue also.Ex.Fungi. Similarly is there any independent living organ??

As we know the sequence

Organism- organ systems - organ - tissue - cell

Q. The structural and functional unit of organisms is a ___ .

1. tissue
2. cell
3. blood
4. air

Q.

What are the advantages to organisms who undergo apoptosis?