Cell Structure and Functions - Exemplar Solutions 3
CBSE Class 8 Science
NCERT Exemplar Solutions
CHAPTER 8
Cell – Structure and Functions
NCERT Exemplar Solutions
CHAPTER 8
Cell – Structure and Functions
SHORT ANSWER QUESTIONS
31. Is the following statement correct? If it is wrong, correct the statement
Statement: “Unicellular organisms do not respire; only multicellular organisms respire”
Ans. No, the statement is wrong.
Both unicellular and multicellular organisms respire/all organisms respire.
32. Match the terms given in column I with their functions given in
column II and fill the blanks given below the table:
A-_____; B-______; C-______; D-______
Ans.
| A | iii |
| B | iv |
| C | ii |
| D | i |
33. Observe the following diagram given as Fig. 8.1.
Answer the following questions.
A. Does it represent a plant cell or an animal cell?
B. Does it represent a prokaryotic cell or an eukaryotic cell?
Ans. A. It represents an animal cell.
B. It represents an eukaryotic cell.
34. Label the parts A to E in the given diagram (Fig. 8.2)
Ans.
35. Classify the following terms into cells, tissues and organs and write in the tabular column given below.
RBC, WBC, Nerve cell, blood, muscle, blood vessels, brain, heart, hand
Cell
|
Tissue
|
Organ
|
…………
|
………..
|
………….
|
…………
|
…………
|
…………
|
…………
|
…………
|
…………
|
Ans.
Cell
|
Tissue
|
Organ
|
RBC
|
Blood
|
Blood vessels
|
WBC
|
Muscle
|
Heart
|
Nerve cell
|
Hand Brain
|
36. Read the following statements and write the appropriate terms against each statement.
A. I control the functions of a cell. Who am I? .................
B. I am like a policeman. I do not allow anything and everything to get in and out of the cell. Who am I? .................
C. I transfer characters from parents to off springs. Who am I? ..................
B. I am like a policeman. I do not allow anything and everything to get in and out of the cell. Who am I? .................
C. I transfer characters from parents to off springs. Who am I? ..................
Ans. A- Nucleus; B-Cell membrane; C-Genes/Chromosomes
37. Fill in the blanks with the terms given in the box below:
Nucleus, chromosomes, cell wall, cell membrane, protoplasm, cytoplasm, ribosome, cell organelles
The outermost layer of plant cells is the (a)__________ beneath which is the (b) __________. The term (c) __________ refers to the jelly-like substance containing all the (d) __________. The (e) __________ contains thread-like structures called (f) __________.
Ans. a-cell wall; b-cell membrane; c-cytoplasm; d-cell organelles; e-nucleus; f-chromosomes.
