Apomixis is

(1) formation of seeds by fusion of gametes

(2) formation of seed without syngamy and meiosis

(3) formation of seeds with syngamy but no meiosis

(4) none of the above

Subtopic:  Apomixis & Polyembryony |
 83%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Which one of the following methods is commonly used to maintain the genetic traits of a given plant?

(1) By propagating through seed germination

(2) By propagating through vegetative multiplication

(3) By generating hybrids through intergeneric pollination

(4) By treating the seeds with gamma radiations

Subtopic:  Asexual Reproduction |
 62%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

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 |
 51%
AIIMS - 2008
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

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 |
 70%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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 |
 86%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

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 |
 91%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

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 |
 95%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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 |
 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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

(1) One

(2) Two

(3) Three

(4) Four

Subtopic:  Double Fertilization |
 52%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

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 |
 61%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch