NCERT Class VIII Science Solutions: Chapter 8-Cell Structure and Functions Part 4 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 22:

Which of the following statements are true for eukaryotic cells?

  1. They do not have a nuclear membrane.
  2. They have a well-organized nucleus.
  3. They have a nuclear membrane.
  4. Blue green algae are eukaryotic cells.
  5. ii and iv
  6. ii and iii
  7. i and ii
  8. i and iv

Answer: B

Eukaryotic Cells

Question 23:

Identify the correct statement about cells.

  1. All the cells have nucleus.
  2. Cells of an organ have similar structure.
  3. Cells of a tissue have similar structure.
  4. Shape of all types of cells is round.

Answer: C

Question 24:

The table given below has certain terms and four blank spaces named A, B, C and D.

Cell Part and Function
CellFeature/partFunction
AmoebaAMovement
Plant cellPlastidB
CSpindle shapedContraction
Nerve cellDStimuli and response

From the options given below choose the correct combination of terms.

  1. A-Pseudopodia; B-Respirations; C-Muscle cell; D-Branched
  2. A-Pseudopodia; B-Photosynthesis; C-Muscle cell; D-Branched
  3. A-Contractile vacuole; B-Photosynthesis; C-Blood cell; D-Spindle shaped
  4. A-Pseudopodia; B-Photosynthesis; C-Cheek cell; D-Spindle shaped

Answer: B

VERY SHORT ANSWER QUESTIONS

Question 25:

In leaves, name the cell organelle and pigment that is responsible for green colour.

Answer:

Chloroplast and chlorophyll

Question 26:

The instrument used to observe cells is ________

Answer:

The instrument used to observe cells is Microscope

Question 27:

We do not sense any pain when we clip our nails or cut our hair. Why?

Answer:

Nails and hair are both made up of dead cells. They do not have nerve cells. Hence we don՚t feel the pain when they are cut.

Question 28:

In a cell, where are the genes located?

Answer:

Nucleus/chromosomes

What is Genes