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Question (31)

QN007769

Which statement best explains the unifying principle of biology?

(A) All living organisms share cellular organization
(B) All organisms have leaves
(C) All organisms perform photosynthesis
(D) All organisms are unicellular

Correct Answer: A

Explanation:

Cell theory unifies biology by showing all living organisms are cellular.

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Question (32)

QN007770

Which scientist is known as the father of cell biology?

(A) Robert Hooke
(B) Robert Brown
(C) Virchow
(D) Schleiden

Correct Answer: A

Explanation:

Robert Hooke is regarded as the father of cell biology.

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Question (33)

QN007771

Which level of organization directly follows the cell in multicellular organisms?

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

Correct Answer: B

Explanation:

Similar cells combine to form tissues.

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Question (34)

QN007772

A group of organs working together forms a:

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

Correct Answer: C

Explanation:

Organs together form an organ system.

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Question (35)

QN007773

Which of the following discoveries led to the formulation of cell theory?

(A) Discovery of DNA
(B) Discovery of microscope
(C) Discovery of gravity
(D) Discovery of atoms

Correct Answer: B

Explanation:

Discovery of microscopes enabled observation of cells.

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Question (36)

QN007774

If a bacterial population doubles every 20 minutes, how many bacteria will be present after 1 hour starting from one bacterium?

(A) 2
(B) 4
(C) 8
(D) 16

Correct Answer: C

Explanation:

Population doubles three times in 1 hour: 1 → 2 → 4 → 8.

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Question (37)

QN007775

Which feature is common to all living cells?

(A) Cell wall
(B) Chloroplast
(C) Plasma membrane
(D) Large vacuole

Correct Answer: C

Explanation:

All cells possess a plasma membrane.

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Question (38)

QN007776

Which concept connects plants and animals under one biological principle?

(A) Respiration theory
(B) Evolution theory
(C) Cell theory
(D) Atomic theory

Correct Answer: C

Explanation:

Cell theory applies to both plants and animals.

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Question (39)

QN007777

Which of the following is an example of a unicellular eukaryote?

(A) Bacterium
(B) Amoeba
(C) Virus
(D) Mushroom

Correct Answer: B

Explanation:

Amoeba is a unicellular eukaryotic organism.

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Question (40)

QN007778

Which scientist proposed that all plants are composed of cells?

(A) Hooke
(B) Schwann
(C) Schleiden
(D) Virchow

Correct Answer: C

Explanation:

Schleiden proposed that plants are made of cells.

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Question (31)

Which statement best explains the unifying principle of biology?

Explanation:

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Question (32)

Which scientist is known as the father of cell biology?

Explanation:

Link:

Question (33)

Which level of organization directly follows the cell in multicellular organisms?

Explanation:

Link:

Question (34)

A group of organs working together forms a:

Explanation:

Link:

Question (35)

Which of the following discoveries led to the formulation of cell theory?

Explanation:

Link:

Question (36)

If a bacterial population doubles every 20 minutes, how many bacteria will be present after 1 hour starting from one bacterium?

Explanation:

Link:

Question (37)

Which feature is common to all living cells?

Explanation:

Link:

Question (38)

Which concept connects plants and animals under one biological principle?

Explanation:

Link:

Question (39)

Which of the following is an example of a unicellular eukaryote?

Explanation:

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Question (40)

Which scientist proposed that all plants are composed of cells?

Explanation:

Link:

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