Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube because

(1) laser beam stimulates pollen germination and pollen tube growth

(2) the laser beam does not damage the region from which pollen tube emerges

(3) the contents of killed generative cell permits germination and pollen tube growth

(4) the vegetative cell has not been damaged.

Subtopic:  Stamen: Male Gametophyte |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

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What is the charasteristic of tapetum ?

(1) It does not store food.

(2) It is multi-nucleated.

(3) It is multi-layered structure.

(4) It nourishes the megaspore.

Subtopic:  Stamen: Anther |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

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Cleistogamy is leadingover anthesis because

(1) pollination agent is not required

(2) it assures heterozygosity

(3) it favours insect pollination

(4) it allows xenogamy

Subtopic:  Pollination & Outbreeding Devices |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

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Sporopollenin is a constituent of pollen exine.

It can be degraded by the action of 

(1) enzymes

(2) high temperature

(3) strong acids

(4) cannot be degraded

Subtopic:  Stamen: Male Gametophyte |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:


The pollen grains of rice and wheat lose their viability in ___ minutes of their release.

(1) 30

(2) 10

(3) 60

(4) 90

Subtopic:  Stamen: Male Gametophyte |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

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After double fertilizaton, a mature ovule has

(1) 1 diploid and 1 haploid cell

(2) 1 diploid and 1 triploid cell

(3) 2 haploid and 1 triploid cell

(4) 1 haploid and 1 triploid cell

Subtopic:  Double Fertilization |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:


How many haploid nuclei are present in a mature pollen grain?

(1) One

(2) Two

(3) Three

(4) Four

Subtopic:  Double Fertilization |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:


What is the correct sequence of the formation of female gametophyte in angiosperms?

(1) Nucellus, megapore tetrad, megaspore mother cell, megaspore, female gametophyte

(2) Megaspore tetrad, nucellus, megaspore mother cell, megaspore, female gametophyte

(3) Nucellus, megaspore mother cell, megaspore tetrad, megaspore, female gametophyte

(4) Megaspore mother cell, megaspore tetrad, megaspore, nucellus, female gametophyte

Subtopic:  Pistil: Female Gametophyte |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:


Primary endosperm nucleus (PEN) is formed by the fusion of

(1) 2 polar nuclei + 1 synergid cell nucleus

(2) 1 polar nucleus + 1 antipodal cell nucleus + 1 synergid cell nucleuus

(3) 2 polar nuclei + 1 male gamete nucleus

(4) 2 antipodal cell nuclei + 1 male gamete nucleus

Subtopic:  Endosperm |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:


Identify the parts labelled A, B, C and D in the given figure and select the correct option.

 

        A

        B

        C

        D

(1)

Scutellum  

Epiblast

Coleoptile

Coleorhiza       

(2)

Scutellum

Coleorhiza   

Coleoptile

Epiblast

(3)

Scutellum

Coleoptile

Coleorhiza   

Epiblast

(4)  

Epiblast

Coleoptile

Coleorhiza

Scutellum

Subtopic:  Embryo |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level: