Which one of the following generates new genetic combinations leading to variation?

1.  Vegetative reproduction

2.  Parthenogenesis

3.  Sexual reproduction

4.  Nucellar polyembryony

Subtopic:  Sexual Reproduction |
 94%
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NEET - 2016
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Match Column I with column II and select the correct option using the codes given below:

Column I   Column II
A. Pistils fused together 1. Gametogenesis
B. Formation of gametes 2. Pistillate
C.  Hyphae of higher ascomycetes   3.   Syncarpous
D. Unisexual female flower 4. Dikaryotic

1.  A-4 B-3 C-2 D-1

2.  A-2 B-1 C-4 D-3

3.  A-1 B-2 C-4 D-3

4.  A-3 B-1 C-4 D-2

Subtopic:  Events during Sexual reproduction |
 79%
From NCERT
NEET - 2016
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In the majority of angiosperms:

1. egg has a filiform apparatus
2. there are numerous antipodal cells
3. reduction division occurs in the megaspore mother cells
4. a small central cell is present in the embryo sac

Subtopic:  Pistil: Female Gametophyte |
 77%
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NEET - 2016
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Pollination in water hyacinth and water lily is brought about by the agency of:

1. water 2. insects or wind
3. birds 4. bats
Subtopic:  Pollination & Outbreeding Devices |
 93%
From NCERT
NEET - 2016
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The ovule of an angiosperm is technically equivalent to:
1. megasporangium
2. megasporophyll
3. megaspore mother cell
4. megaspore
Subtopic:  Pistil: Ovule |
 70%
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Taylor conducted the experiments to prove semi-conservative mode of chromosome replication on:

1. Vinca rosea

2. Vicia faba

3. Drosophila melanogaster

4. E. Coli

Subtopic:  DNA Replication: I | DNA Replication |
 87%
From NCERT
NEET - 2016
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The mechanism that causes a gene to move from one linkage group to another is called?

1. inversion

2. duplication

3. translocation

4. crossing-over

Subtopic:  Understanding Linkage |
 71%
NEET - 2016
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The equivalent of a structural gene is:

1.  muton 2.  cistron
3.  operon 4.  recon
Subtopic:  Transcription |
 81%
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A true-breeding plant is:

1. one that is able to breed on its own
2. produced due to cross-pollination among unrelated plants
3. near homozygous and produces offspring of its own kind
4. always homozygous recessive in its genetic constitution

Subtopic:  Monohybrid Cross: 1 |
 68%
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NEET - 2016
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Which of the following rRNA acts as structural RNA as well as ribozyme in bacteria?

1.  5S rRNA
2.  18S rRNA
3.  23S rRNA
4.  5.8S rRNA
Subtopic:  Translation |
 81%
From NCERT
NEET - 2016
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