Subtopic: Growth Hormones & Auxin |
84%
Level 1: 80%+
NEET - 2016
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Which of the following is the most important cause of animals and plants being driven to extinction?
1. Alien species invasion
2. Habitat loss and fragmentation
3. Co-extinctions
4. Over-exploitation
2. Habitat loss and fragmentation
3. Co-extinctions
4. Over-exploitation
Subtopic: Loss of Biodiversity |
92%
Level 1: 80%+
NEET - 2016
Hints
Which of the following approaches does not give the defined action of contraceptive?
| 1. | Intra uterine devices | Increases phagocytosis of sperms, suppress sperm motility and fertilizing capacity of sperms |
| 2. | Hormonal | Prevent/retard entry of sperms, prevent ovulation and fertilization |
| 3. | Vasectomy | Prevents spermatogenesis |
| 4. | Barrier methods | Prevent fertilisation |
Subtopic: Hormonal Contraceptives, Emergency Contraception & Terminal Methods |
81%
Level 1: 80%+
NEET - 2016
Hints
Links
In a test cross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant type offspring. This indicates:
| 1. | chromosomes failed to separate during meiosis |
| 2. | the two genes are linked and present on the same chromosome |
| 3. | both of the characters are controlled by more than one gene |
| 4. | the two genes are located on two different chromosomes |
Subtopic: Linkage | Recombination Gene Mapping |
82%
Level 1: 80%+
NEET - 2016
Hints
A typical fat molecule is made up of?
1. One glycerol and three fatty acid molecules
2. One glycerol and one fatty acid molecule
3. Three glycerol and three fatty acid molecules
4. Three glycerol molecules and one fatty acid molecule.
2. One glycerol and one fatty acid molecule
3. Three glycerol and three fatty acid molecules
4. Three glycerol molecules and one fatty acid molecule.
Subtopic: Lipids: Fatty Acids |
73%
Level 2: 60%+
NEET - 2016
Hints
Match the terms in Column-I with their description in Column-II and choose the correct option.
| Column-I | Column-II | ||
| A. | Dominance | 1. | Many govern a single character |
| B. | Codominance | 2. | In a heterozygous organism, only one allele expresses itself |
| C. | Pleiotropy | 3. | In a heterozygous organism, both alleles express themselves fully |
| D. | Polygenic inheritance | 4. | A single gene influences many characters |
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 4 | 1 | 2 | 3 |
| 3. | 4 | 3 | 1 | 2 |
| 4. | 2 | 1 | 4 | 3 |
Subtopic: Polygenic Inheritance & Pleiotropy | Co-dominance |
91%
Level 1: 80%+
NEET - 2016
Hints
Which of the following statements is not correct?
| 1. | Insects that consume pollen or nectar without bringing about pollination are called pollen-nectar robbers. |
| 2. | Pollen germination and pollen tube growth are regulated by chemical compounds of pollen interacting with those of the pistil. |
| 3. | Some reptiles have also been reported as pollinators in some plant species. |
| 4. | Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style. |
Subtopic: Pollen - Pistil Interaction |
72%
Level 2: 60%+
NEET - 2016
Hints
Which of the following features is not present in Periplaneta americana?
| 1. | Indeterminate and radial cleavage during embryonic development |
| 2. | Exoskeleton composed of N-acetylglucosamine |
| 3. | Metamerically segmented body |
| 4. | -Schizocoelom as body cavity |
Subtopic: Cockroach: Solved Examples |
62%
Level 2: 60%+
NEET - 2016
Hints
Water-soluble pigments found in plant cell vacuoles are:
| 1. | chlorophylls | 2. | carotenoids |
| 3. | anthocyanins | 4. | xanthophylls |
Subtopic: Pigments |
58%
Level 3: 35%-60%
NEET - 2016
Hints
A cell at the telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at the telophase stage. There is no formation of a cell plate and thus the cell is containing more chromosomes as compared to other dividing cells. This would result in:
1. polyploidy
2. somaclonal variation
3. polyteny
4. aneuploidy
Subtopic: Non - Disjunction & Aneuploidy |
81%
Level 1: 80%+
NEET - 2016
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