The process of ecological succession following a forest fire is classified as:

The correct answer is B: Secondary succession. Secondary succession occurs on previously colonized areas where soil remains intact, such as after a fire. Primary succession occurs on bare rock or new land.

A person experiences vasoconstriction and increased heart rate upon seeing a predator. This response is mediated by:

The correct answer is B: Sympathetic nervous system. The fight-or-flight response involves sympathetic activation releasing epinephrine and norepinephrine causing vasoconstriction and tachycardia.

Which of the following evolutionary evidences is based on the study of vestigial structures like human tailbone and wisdom teeth?

The correct answer is B: Anatomical/Comparative morphological evidence. Vestigial structures are anatomical remnants that indicate common ancestry with other organisms, supporting comparative morphology evidence.

Homologous structures like bat wings, whale flippers, and human arms demonstrate evolutionary relationship through:

The correct answer is B: Divergent evolution and common ancestry. These structures share similar bone arrangements despite different functions, indicating descent from a common ancestor with modification—evidence for divergent evolution.

The countercurrent multiplier mechanism in the Loop of Henle allows the kidney to produce concentrated urine by:

The correct answer is A: Active transport of ions without water movement in ascending limb. The ascending limb actively transports Na+/K+/Cl- without water permeability, creating osmotic gradients that concentrate urine in the collecting duct.

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NEET Zoology
Reproductive Health

Zoology questions for NEET UG — Animal Kingdom, Human Physiology, Genetics, Evolution.

31 Q 6 Topics Take Mock Test

Difficulty: All Easy Medium Hard 31–31 of 31

Topics in NEET Zoology

All Animal Kingdom 100 Human Physiology 100 Genetics & Evolution 100 Reproductive Health 100 Ecology & Environment 100 Biotechnology & Applications 40

Q.31 Easy Reproductive Health

Which hormone is primarily responsible for the regulation of spermatogenesis in males?

A Testosterone

B Estrogen

C Progesterone

D Prolactin

Correct Answer: A. Testosterone

EXPLANATION

Testosterone, produced by Leydig cells in testes, is the primary hormone regulating spermatogenesis. It acts on Sertoli cells and is essential for sperm production.

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NEET Zoology Reproductive Health

NEET Zoology
Reproductive Health