NEET Test 139

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NEET Test 139

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following is a day neutral plant?

A
Oat

B
Campanula

C
Cucumber

D
Sugarcane

Solution

Day-neutral plants have a flowering process that is not regulated by day length at all. Instead, these plants bloom when they are simply old enough too. Examples: cucumber, corn, tomato, pea, and dandelion. Home gardeners can really benefit from this with their vegetable planting
Question 2
4 / -1

Long filamentous threads protruding at the end of a young cob of maize are:

A
anthers

B
styles

C
ovaries

D
hairs

Solution

In cob of maize, each ovary has a long silky (hairy) style, called as corn silk. Collectively these styles protrude at the end of a young cob. The grains are formed on the cob which remain covered by the leafy bracts. It provides a female flower surface to which pollen grains adhere. The corn silk tip is the stigma.

Maize cobs are a by-product of the maize crop, consisting of the central fibrous rachis of the female inflorescence( the maize ear).
Question 3
4 / -1

The temperatures across two different slabs A and B are of the same length and same crossectional area are at steady state (as shown in the diagram). The ratio of thermal conductivities of A and B is:

A
2 : 3

B
3 : 2

C
1 : 1

D
5 : 3

Solution

As given, slabs A and B are of the same length and same crossectional area are at steady state.
Question 4
4 / -1

Which of the following pairs of atoms shows the inert pair effect?

A
Ge and As

B
Sn and Ge

C
Sn and Pb

D
As and Sn

Solution

Lead loses its two 6p electrons, but the 6s electrons are left unchanged, an "inert pair". This indicates that it is more difficult to remove the p electrons from lead than from tin.

The inert pair effect is nothing but the extra stability concept. Generally, p-block elements belonging to 3A, 4A, 5A, 6A, etc, show variable valency. For example, the Sn element of group 4A shows a +4 and +2 oxidation state.
Question 5
4 / -1

A particle moves from position acts on it. What is the work done by the force?

A
110 J

B
113 J

C
80 J

D
50 J

Solution
Question 6
4 / -1

A
1-P, 2-R, 3-S, 4-Q

B
1-Q, 2-P, 3-S, 4-R

C
1-R, 2-Q, 3-P, 4-S

D
1-S, 2-P, 3-R, 4-Q

Solution
Question 7
4 / -1

The value of alternating emf E in the given circuit will be:

A
220 V

B
140 V

C
100 V

D
20 V

Solution
Question 8
4 / -1

In a grazing food chain:

A
Primary consumers eat detritus

B
Primary consumers eat photosynthetic organisms

C
Secondary consumers eat detritus

D
Secondary consumers eat photosynthetic organisms

Solution

Grazing is the process whereby herbivores eat plant material. Grazers employ a variety of strategies to ensure they maximise nutrient digestion and uptake such as rumination which is the process of chewing the cud. A grazing food chain is a food chain in which the energy in the lowest trophic level is derived from photosynthesis. In grazing food chains the first energy transfer is from plants to herbivores and this is in contrast to detritus food chains where the first energy transfer is from decaying material to detritivores.
Question 9
4 / -1
Directions For Questions
The One Health approach is critical to addressing health threats in the animal, human and environment interface. Which of the following areas of work include this approach.
1. Control of zoonotic disease
2. Neglected tropical diseases
3. Environmental health
4. Food safety
5. Antimicrobial resistance
6. Laboratory services
...view full instructions
Select the correct answer using the code given below?

A
1, 3, 4, 5 and 6

B
2, 3, 4, 5 and 6

C
1, 2, 3, 4 and 5

D
1, 2, 3, 4, 5 and 6
Solution
One Health' is an approach to designing and implementing programmes, policies, legislation and research in which multiple sectors communicate and work together to achieve better public health outcomes. The ‘One Health’ approach is critical to addressing health threats in the animal, human and environment interface.

The areas of work in which a One Health approach is particularly relevant include:
1. food safety
2. control of zoonotic diseases
3. laboratory services
4. neglected tropical diseases
5. environmental health
6. antimicrobial resistance
All these areas cover complex issues that require close collaboration across sectors, stakeholders and countries.
Question 10
4 / -1

Which one of the following pairs is incorrectly matched?

A
Glucagon - Beta cells (source)

B
Somatostain - Delta cells (source)

C
Corpus luteum - Relaxin (secretion)

D
Insulin - Diabetes mellitus (disease)

Solution

Glucagon is secreted by cells of the islets of Langerhans in the pancreas. It increases the concentration of glucose in the blood by stimulating the breakdown of glycogen.