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Question (31)

QN008529

The three domains of life are

(A) Monera, Protista and Fungi
(B) Bacteria, Archaea and Eukarya
(C) Plantae, Animalia and Fungi
(D) Protista, Plantae and Animalia

Correct Answer: B

Explanation:

The three domains are Bacteria, Archaea and Eukarya.

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Question (32)

QN008530

The three-domain system was primarily developed using comparisons of

(A) body size
(B) habitat preference
(C) DNA and genetic information
(D) colour patterns

Correct Answer: C

Explanation:

Genetic analysis formed the basis of the three-domain system.

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Question (33)

QN008531

Organisms with similar DNA are considered to have

(A) similar habitats only
(B) a common ancestry
(C) identical behaviour
(D) identical body size

Correct Answer: B

Explanation:

Genetic similarity suggests evolutionary relationships and common ancestry.

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Question (34)

QN008532

Which statement best reflects the importance of genetic studies in classification?

(A) They replace all visible characteristics.
(B) They reveal evolutionary relationships more accurately.
(C) They classify organisms only by habitat.
(D) They apply only to plants.

Correct Answer: B

Explanation:

DNA studies provide deeper insight into evolutionary connections.

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Question (35)

QN008533

If a newly discovered microorganism is genetically very different from known bacteria, which modern approach would be most useful for classification?

(A) Habitat-based grouping
(B) Body colour comparison
(C) DNA-based analysis
(D) Size comparison only

Correct Answer: C

Explanation:

Genetic analysis is the most reliable modern method.

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Question (36)

QN008534

A classification system groups a mushroom and a rose together because neither moves from place to place. What limitation does this show?

(A) Overreliance on a single observable feature
(B) Excessive use of DNA evidence
(C) Use of ecological roles
(D) Consideration of cell structure

Correct Answer: A

Explanation:

Classification based on only one feature can lead to incorrect grouping.

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Question (37)

QN008535

Which event directly led to the recognition that bacteria should not remain grouped with all other unicellular organisms?

(A) Discovery of flowers
(B) Discovery of a membrane-bound nucleus in some unicellular organisms but not in bacteria
(C) Discovery of fossils
(D) Discovery of pollination

Correct Answer: B

Explanation:

The true nucleus became a key criterion for classification.

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Question (38)

QN008536

A student argues that classification systems should never change. Which scientific principle contradicts this view?

(A) Scientific knowledge evolves with new evidence.
(B) Habitats never change.
(C) Organisms cannot be compared.
(D) Classification is based only on appearance.

Correct Answer: A

Explanation:

Science continuously updates explanations when new evidence becomes available.

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Question (39)

QN008537

Which classification approach is likely to produce the most evolutionarily accurate grouping?

(A) Grouping by colour only
(B) Grouping by habitat only
(C) Grouping by genetic similarity
(D) Grouping by body size only

Correct Answer: C

Explanation:

Genetic similarity reflects evolutionary relationships more accurately.

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Question (40)

QN008538

Why is the three-domain system considered an advancement over the five-kingdom system?

(A) It contains fewer groups.
(B) It ignores microorganisms.
(C) It incorporates genetic evidence and reveals deeper evolutionary relationships.
(D) It classifies organisms only by nutrition.

Correct Answer: C

Explanation:

The three-domain system uses genetic evidence to show evolutionary relationships more precisely.

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Question (31)

The three domains of life are

Explanation:

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Question (32)

The three-domain system was primarily developed using comparisons of

Explanation:

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Question (33)

Organisms with similar DNA are considered to have

Explanation:

Link:

Question (34)

Which statement best reflects the importance of genetic studies in classification?

Explanation:

Link:

Question (35)

If a newly discovered microorganism is genetically very different from known bacteria, which modern approach would be most useful for classification?

Explanation:

Link:

Question (36)

A classification system groups a mushroom and a rose together because neither moves from place to place. What limitation does this show?

Explanation:

Link:

Question (37)

Which event directly led to the recognition that bacteria should not remain grouped with all other unicellular organisms?

Explanation:

Link:

Question (38)

A student argues that classification systems should never change. Which scientific principle contradicts this view?

Explanation:

Link:

Question (39)

Which classification approach is likely to produce the most evolutionarily accurate grouping?

Explanation:

Link:

Question (40)

Why is the three-domain system considered an advancement over the five-kingdom system?

Explanation:

Link:

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