The ultimate source of variation is

The ultimate source of variation is

Options

(a) natural selection (b) mutation (c) sexual reproduction (d) hormonal effects

Correct Answer:

mutation

Explanation:

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Nerve impulse initiates with the movements of

Nerve impulse initiates with the movements of

Options

(a) Ca⁺⁺ (b) K⁺ (c) Mg⁺⁺ (d) Na⁺

Correct Answer:

Na⁺

Explanation:

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The lateral roots originate from

The lateral roots originate from

Options

(a) pericycle (b) exodermis (c) vascular bundles (d) endodermis

Correct Answer:

pericycle

Explanation:

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The lower jaw of a mammal is made up of

The lower jaw of a mammal is made up of

Options

(a) premaxilla (b) dentary (c) post maxilla (d) maxilla

Correct Answer:

dentary

Explanation:

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