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Q. No.Consider the given two statements:
Assertion (A):
Frogs undergo summer sleep and winter sleep.
Reason (R):
Frogs are endotherms.
1.
Both (A) and (R) are True and (R) is the correct explanation of (A).
2.
Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.
(A) is True but (R) is False.
4.
(A) is False but (R) is True.
Subtopic: Frogs |
65%
From NCERT
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The digestive system of a frog is characterized by:
1. The absence of a stomach
2. A three-chambered heart
3. The presence of both a liver and a pancreas
4. The lack of salivary glands
1. The absence of a stomach
2. A three-chambered heart
3. The presence of both a liver and a pancreas
4. The lack of salivary glands
Subtopic: Frogs: Anatomy (Digestive System) |
82%
From NCERT
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Differences between male and female cockroach morphology include:
| 1. | Males have a pair of anal styles, which females lack |
| 2. | Females have a more segmented abdomen than males |
| 3. | Males are generally larger than females |
| 4. | Females have a pair of cerci, which males lack |
Subtopic: Cockroach:Male Reproductive System | Cockroach: Female Reproductive System |
95%
From NCERT
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Which organ is primarily used by frogs for gas exchange when they are active on land?
1. Skin
2. Lungs
3. Buccal cavity
4. Gills
1. Skin
2. Lungs
3. Buccal cavity
4. Gills
Subtopic: Frogs |
78%
From NCERT
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Evaluate the following statements and select the option that correctly identifies the true statements:
1. Only I, III, and IV are correct.
2. Only I, II, and III are correct.
3. Only II, III, and IV are correct.
4. Only I and III are correct.
| I: | Collagen fibres are predominantly found in connective tissues and are important for providing tensile strength. |
| II: | Nervous tissue is made up of neurons and neuroglia, where neurons are responsible for transmitting signals and neuroglia for blood clotting. |
| III: | Cardiac muscle tissue is striated and involuntary, with cells connected by intercalated discs to facilitate synchronized contraction. |
| IV: | Epithelial tissues are avascular but derive nutrients through diffusion from underlying connective tissues |
2. Only I, II, and III are correct.
3. Only II, III, and IV are correct.
4. Only I and III are correct.
Subtopic: Connective Tissue |
81%
From NCERT
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Consider the following statements about the reproductive system of a male frog and choose the correct option:
1. Only I and II are correct.
2. Only I and III are correct.
3. Only II and III are correct.
4. All statements are correct.
| I: | The male frog has a pair of testes which are attached to the kidneys by a structure called mesorchium. |
| II: | The male frog's sperm travels through the urethra which also carries urine. |
| III: | External fertilization occurs, and the frog's sperm are released directly into the surrounding water. |
2. Only I and III are correct.
3. Only II and III are correct.
4. All statements are correct.
Subtopic: Frogs |
From NCERT
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Match the following types of tissues with their functions:
1. 1-D, 2-A, 3-B, 4-C
2. 1-C, 2-B, 3-A, 4-D
3. 1-B, 2-C, 3-D, 4-A
4. 1-A, 2-D, 3-C, 4-B
| Column I | Column II | ||
| 1 | Adipose tissue | A | Conducts electrical impulses |
| 2 | Cartilage | B | Stores fat and provides insulation |
| 3 | Smooth muscle tissue | C | Reduces friction between bones at joints |
| 4 | Neuron | D | Contracts to cause movement in various organs |
2. 1-C, 2-B, 3-A, 4-D
3. 1-B, 2-C, 3-D, 4-A
4. 1-A, 2-D, 3-C, 4-B
Subtopic: Connective Tissue |
99%
From NCERT
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How do frogs primarily excrete nitrogenous waste?
| 1. | As ammonia through the skin when submerged in water. |
| 2. | As urea through the kidneys. |
| 3. | As uric acid via the cloaca. |
| 4. | As urea through the skin. |
Subtopic: Frogs: Anatomy (Excretory System) |
67%
From NCERT
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Identify the incorrect statement about frog:
| 1. | During aestivation and hibernation, gaseous exchange takes place through skin. |
| 2. | Forebrain includes olfactory lobes, paired cerebral hemispheres and unpaired diencephalon. |
| 3. | The urinary bladder is present dorsal to the rectum which also opens in the cloaca. |
| 4. | A mature female can lay 2500 to 3000 ova at a time. |
Subtopic: Frogs: Anatomy (Excretory System) |
73%
From NCERT
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Epithelial tissues lining the inner surface of the stomach are simple columnar epithelium with microvilli. What is the primary function of these microvilli?
| 1. | They provide structural support |
| 2. | They facilitate secretion |
| 3. | They increase surface area for absorption |
| 4. | They act as sensory receptors |
Subtopic: Simple Epithelium |
91%
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