Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following :

1. Tyloses in vessels

2. Closure of stomata 

3. Flaccidity of bulliform cells

4. Shrinkage of air spaces in spongy mesophyll

Subtopic:  Monocot Leaf |
 81%
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NEET - 2019
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What triggers the activation of protoxin to active Bt toxin of Bacillus thuringiensis in bollworms?

1. Acidic pH of the stomach

2. Body temperature 

3. Moist surface of midgut

4. Alkaline pH of the gut

Subtopic:  Bt Crops |
 91%
From NCERT
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Select the correctly written complete scientific name of Mango which was first described by Carolus Linnaeus:

1. Mangifera Indica

2. Mangifera indica Car. Linn.

3. Mangifera indica Linn.

4. Mangifera indica

Subtopic:  Taxonomy 1: Nomenclature |
 87%
From NCERT
NEET - 2019
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Cells in G0 phase:
1. terminate the cell cycle
2. exit the cell cycle
3. enter the cell cycle
4. suspend the cell cycle

Subtopic:  Intro to Cell Cycle & Interphase |
From NCERT
NEET - 2019
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Phloem in gymnosperms lacks:

1. Both sieve tubes and companion cells 

2. Albuminous cells and sieve cells

3. Sieve tubes only

4. Companion cells only

Subtopic:  Complex Tissue: Phloem |
 81%
From NCERT
NEET - 2019
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Which of the following contraceptive methods involve the role of hormones?

1. Pills, Emergency contraceptives, barrier methods
2. Lactational amenorrhea, Pills, Emergency contraceptives
3. Barrier method, Lactational amenorrhea, pills
4. CuT, Pills, barrier methods
Subtopic:  Contraception: Natural Methods | Hormonal Contraceptives, Emergency Contraception & Terminal Methods |
 68%
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NEET - 2019
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Which of the following statements is incorrect?

1. Yeasts have filamentous bodies with long thread-like hyphae.
2. Morels and truffles are edible delicacies.
3. Claviceps is a source of many alkaloids and LSD.
4. Conidia are produced exogenously and ascospores endogenously.
Subtopic:  Kingdom Fungi: Introduction |
 62%
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NEET - 2019
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It takes a very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?

1. Cytokinin and Abscisic acid

2. Auxin and Ethylene

3. Gibberellin and Cytokinin

4. Gibberellin and Abscisic acid

Subtopic:  Auxin Function | Ethylene |
 79%
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NEET - 2019
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Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by:

1. Phosphofructokinase

2. Aldolase

3. Hexokinase

4. Enolase

Subtopic:  Glycolysis |
 90%
From NCERT
NEET - 2019
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Consider the following features:
a. Organ system level of organisation
b. Bilateral symmetry
c. True coelom with segmentation of body
Select the correct option of animal groups that possess all the above characteristics:

1. Annelida, Mollusca and Chordata
2. Annelida, Arthropoda and Chordata
3. Annelida, Arthropoda and Mollusca
4. Arthropoda, Mollusca and Chordata
Subtopic:  Phylum Annelida | Phylum Arthropoda | Phylum Mollusca |
 69%
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NEET - 2019
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