The radial vascular bundles present in monocot roots are characteristic because:

The correct answer is B: Phloem alternates with xylem in radial pattern. Monocot roots display radial vascular bundles where xylem and phloem alternate in a radial pattern from the center.

In monocarpellary ovaries, marginal placentation occurs in plants like:

The correct answer is A: Gram (Cicer arietinum). Gram (chickpea) is a legume with a monocarpellary ovary showing marginal placentation where ovules are attached along the ventral suture.

The middle lamella in plant cell walls is primarily composed of

The correct answer is B: Pectin and calcium pectate. The middle lamella is composed mainly of pectin and calcium pectate, which acts as a cement holding adjacent cells together.

In angiosperms, the tapetum is responsible for providing nutrients to developing pollen grains. Which layer of the anther wall gives rise to the tapetum?

The correct answer is C: Middle layers. The tapetum is derived from the innermost layer of the anther wall, which develops from the middle layers. It undergoes mitotic divisions to form the nutritive tissue for pollen development.

During megasporogenesis in angiosperms, a megaspore mother cell undergoes meiosis to produce four megaspores. In most flowering plants, how many of these megaspores degenerate?

The correct answer is C: Three megaspores degenerate. In typical monosporic development, the megaspore mother cell produces four megaspores through meiosis, but only one (usually the chalazal megaspore) survives and develops into the female gametophyte. The other three degenerate.

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NEET Botany
Genetics & Heredity

Botany questions for NEET UG — Plant Anatomy, Physiology, Reproduction, Ecology.

3 Q 7 Topics Take Mock Test

Difficulty: All Easy Medium Hard 1–3 of 3

Topics in NEET Botany

All Plant Kingdom 100 Plant Anatomy 100 Plant Physiology 100 Reproduction in Plants 60 Genetics & Heredity 20 Ecology & Environment 20 Biotechnology in Plants 20

Q.1 Hard Genetics & Heredity

A cross between a plant with genotype AaBb and a plant with genotype aabb produces 160 offspring. Due to linkage between genes A and B (20 map units apart), the expected frequency of AaBb offspring will be approximately ______.

A 10

B 20

C 40

D 80

Correct Answer: C. 40

EXPLANATION

With 20 map units distance, recombination frequency is 20%. Parental types (AB/ab) = 40% each, recombinants = 10% each. AaBb from coupling = 40 out of 160.

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Q.2 Hard Genetics & Heredity

In Drosophila, white eye color (w) is recessive to red eye color (w⁺) and is X-linked. If a white-eyed female is crossed with a red-eyed male, what will be the eye color of the F1 females?

A White

B Red

C Pink

D White and red

Correct Answer: B. Red

EXPLANATION

Cross: ww × w⁺Y produces w⁺w (heterozygous females with red eyes) and wY (white-eyed males). F1 females are red-eyed.

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Q.3 Hard Genetics & Heredity

A man with hemophilia (XʰY) marries a normal woman (XʰXʰ). All their daughters will be _______ and all sons will be _______.

A Carriers; affected

B Affected; normal

C Carriers; normal

D Normal; affected

Correct Answer: C. Carriers; normal

EXPLANATION

Cross: XʰY × XʰXʰ produces XʰXʰ (carrier daughters) and XʰY (normal sons). Daughters carry one recessive allele but are phenotypically normal.

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NEET Botany Genetics & Heredity

NEET Botany
Genetics & Heredity