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Question (21)

QN002901

Which level of organisation includes several organs working together?

(A) Tissue
(B) Cell membrane
(C) Organ system
(D) Cytoplasm

Correct Answer: C

Explanation:

Organ systems contain several organs.

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Question (22)

QN002902

A heart is best classified as a/an:

(A) tissue
(B) organ
(C) cell
(D) organism

Correct Answer: B

Explanation:

Heart is an organ.

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Question (23)

QN002903

Which of the following best explains why multicellular organisms survive efficiently?

(A) All cells perform identical functions
(B) Cells specialise and cooperate with one another
(C) Only one organ controls all activities
(D) Tissues function independently without coordination

Correct Answer: B

Explanation:

Specialised cells cooperate efficiently.

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Question (24)

QN002904

In a plant, water-conducting tube-like cells together form a:

(A) tissue
(B) nucleus
(C) vacuole
(D) chloroplast

Correct Answer: A

Explanation:

Similar conducting cells form a tissue.

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Question (25)

QN002905

A scientist observes that an organism has many organ systems working together. The organism is definitely:

(A) unicellular
(B) non-living
(C) multicellular
(D) acellular

Correct Answer: C

Explanation:

Only multicellular organisms have organ systems.

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Question (26)

QN002906

If a tissue contains 250 similar cells and four such tissues form one organ, approximately how many cells are present in that organ?

(A) 250
(B) 500
(C) 750
(D) 1000

Correct Answer: D

Explanation:

250 × 4 = 1000 cells.

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Question (27)

QN002907

A body structure made of different tissues performing a specific function is called:

(A) cell
(B) organ
(C) organism
(D) cytoplasm

Correct Answer: B

Explanation:

Different tissues together form an organ.

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Question (28)

QN002908

Which of the following correctly represents increasing complexity?

(A) Organism → Organ → Tissue → Cell
(B) Cell → Tissue → Organ → Organism
(C) Tissue → Cell → Organ system → Organ
(D) Organ → Cell → Tissue → Organism

Correct Answer: B

Explanation:

Complexity increases from cell to organism.

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Question (29)

QN002909

If one organ system of the body fails completely, survival becomes difficult because:

(A) organ systems are interdependent
(B) cells stop existing immediately
(C) tissues cannot divide
(D) organs become unicellular

Correct Answer: A

Explanation:

Organ systems depend on one another.

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Question (30)

QN002910

Which level of organisation is formed immediately before an organism?

(A) Tissue
(B) Organ
(C) Cell
(D) Organ system

Correct Answer: D

Explanation:

Organ systems together form an organism.

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Question (21)

Which level of organisation includes several organs working together?

Explanation:

Link:

Question (22)

A heart is best classified as a/an:

Explanation:

Link:

Question (23)

Which of the following best explains why multicellular organisms survive efficiently?

Explanation:

Link:

Question (24)

In a plant, water-conducting tube-like cells together form a:

Explanation:

Link:

Question (25)

A scientist observes that an organism has many organ systems working together. The organism is definitely:

Explanation:

Link:

Question (26)

If a tissue contains 250 similar cells and four such tissues form one organ, approximately how many cells are present in that organ?

Explanation:

Link:

Question (27)

A body structure made of different tissues performing a specific function is called:

Explanation:

Link:

Question (28)

Which of the following correctly represents increasing complexity?

Explanation:

Link:

Question (29)

If one organ system of the body fails completely, survival becomes difficult because:

Explanation:

Link:

Question (30)

Which level of organisation is formed immediately before an organism?

Explanation:

Link:

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