Structural Organisation in Animals and Plants

Which of the following are characteristic features of Solanaceae family ? (a) Flowers are bisexual and actinomorphic (b) Calyx have five sepals and are united (c) Androecium have five stamens and are epipetalous (d) Ovary is inferior. Choose the correct answer from the options given below :

NEET 2026

1(a), (b) and (c) only

2(d) only

3(a) and (b) only

4(b), (c) and (d) only

NTA Answer: Option 1(final)

Report an error · Every fix is public: corrections log

Match List-I with List-II. List-I : A. Marginal placentation, B. Axile placentation, C. Parietal placentation, D. Free central placentation. List-II : I. Argemone, II. Tomato, III. Primrose, IV. Pea. Choose the correct answer from the options given below :

NEET 2026

1A-II, B-IV, C-I, D-III

2A-IV, B-II, C-III, D-I

3A-IV, B-III, C-I, D-II

4A-IV, B-II, C-I, D-III

NTA Answer: Option 4(final)

Report an error · Every fix is public: corrections log

Lesson: Frog Anatomy

NEET 2026

In frogs, the number of pairs of cranial nerves arising from the brain are ______.

310

412

NTA Answer: Option 3(final)

Report an error · Every fix is public: corrections log

Which of the following is an example of a zygomorphic flower?

NEET 2025

1Chilli

2Petunia

3Datura

4Pea

NTA Answer: Option 4(final)

Report an error · Every fix is public: corrections log

Lesson: Frog Anatomy

NEET 2025

Frogs respire in water by skin and buccal cavity and on land by skin, buccal cavity and lungs. Choose the correct answer from the following :

1The statement is false for both the environment

2The statement is true for water but false for land

3The statement is true for both the environment

4The statement is false for water but true for land

NTA Answer: Option 4(final)

Report an error · Every fix is public: corrections log

Lesson: Frog Anatomy

NEET 2025

In frog, the Renal portal system is a special venous connection that acts to link :

1Kidney and lower part of body

2Liver and intestine

3Liver and kidney

4Kidney and intestine

NTA Answer: Option 1(final)

Report an error · Every fix is public: corrections log

Lesson: Anatomy Dicot Monocot

NEET 2025

Find the statement that is NOT correct with regard to the structure of monocot stem.

1Phloem parenchyma is absent.

2Hypodermis is parenchymatous.

3Vascular bundles are scattered.

4Vascular bundles are conjoint and closed.

NTA Answer: Option 2(final)

Report an error · Every fix is public: corrections log

Lesson: Frog Anatomy

NEET 2025

Which of the following statement is correct about location of the male frog copulatory pad?

1First digit of the fore limb

2First and Second digit of fore limb

3First digit of hind limb

4Second digit of fore limb

NTA Answer: Option 1(final)

Report an error · Every fix is public: corrections log

Given below are two statements: Statement I: In a floral formula stands for zygomorphic nature of the flower, and G stands for inferior ovary. Statement II: In a floral formula stands for actinomorphic nature of the flower and G stands for superior ovary. In the light of the above statements, choose the correct answer from the options given below:

NEET 2025

1Statement I is incorrect but Statement II is correct

2Both Statement I and Statement II are correct

3Both Statement I and Statement II are incorrect

4Statement I is correct but Statement II is incorrect

NTA Answer: Option 1(final)

Report an error · Every fix is public: corrections log

Lesson: Frog Anatomy

NEET 2025

What is the name of the blood vessel that carries deoxygenated blood from the body to the heart in a frog?

1Vena cava

2Aorta

3Pulmonary artery

4Pulmonary vein

NTA Answer: Option 1(final)

Report an error · Every fix is public: corrections log

Which of the following is an example of actinomorphic flower?

NEET 2024Revised key

1Datura

2Cassia

3Pisum

4Sesbania

NTA Answer: Option 1(revised_final)

Report an error · Every fix is public: corrections log

Identify the type of flowers based on the position of calyx, corolla and androecium with respect to the ovary from the given figures (a) and (b)

NEET 2024Revised key

1(a) Epigynous; (b) Hypogynous

2(a) Hypogynous; (b) Epigynous

3(a) Perigynous; (b) Epigynous

4(a) Perigynous; (b) Perigynous

NTA Answer: Option 4(revised_final)

Report an error · Every fix is public: corrections log

Formation of interfascicular cambium from fully developed parenchyma cells is an example for

NEET 2024Revised key

1Differentiation

2Redifferentiation

3Dedifferentiation

4Maturation

NTA Answer: Option 3(revised_final)

Report an error · Every fix is public: corrections log

Bulliform cells are responsible for

NEET 2024Revised key

1Inward curling of leaves in monocots.

2Protecting the plant from salt stress.

3Increased photosynthesis in monocots.

4Providing large spaces for storage of sugars.

NTA Answer: Option 1(revised_final)

Report an error · Every fix is public: corrections log

Match List I with List II List I List II A. Rose I. Twisted aestivation B. Pea II. Perigynous flower C. Cotton III. Drupe D. Mango IV. Marginal placentation Choose the correct answer from the options given below :

NEET 2024Revised key

1A-II, B-IV, C-I, D-III

2A-I, B-II, C-III, D-IV

3A-IV, B-III, C-II, D-I

4A-II, B-III, C-IV, D-I

NTA Answer: Option 1(revised_final)

Report an error · Every fix is public: corrections log

Match List I with List II List I List II (Types of Stamens) (Example) A. Monoadelphous I. Citrus B. Diadelphous II. Pea C. Polyadelphous III. Lily D. Epiphyllous IV. China-rose - 39 - NEET (UG)-2024 (Code-Q3) Choose the correct answer from the options given below:

NEET 2024Revised key

1A-IV, B-II, C-I, D-III

2A-IV, B-I, C-II, D-III

3A-I, B-II, C-IV, D-III

4A-III, B-I, C-IV, D-II

NTA Answer: Option 1(revised_final)

Report an error · Every fix is public: corrections log

Lesson: Frog Anatomy

NEET 2024Revised key

In both sexes of cockroach, a pair of jointed filamentous structures called anal cerci are present on

15th segment

210th segment

38th and 9th segment

411th segment

NTA Answer: Option 2(revised_final)

Report an error · Every fix is public: corrections log

Lesson: Frog Anatomy

NEET 2024Revised key

Match List I with List II related to digestive system of cockroach. List-I List-II A. The structures used for I. Gizzard storing of food. B. Ring of 6-8 blind tubules II. Gastric Caeca at junction of foregut and midgut. C. Ring of 100-150 yellow III. Malpighian tubules coloured thin filaments at junction of midgut and hindgut. - 51 - NEET (UG)-2024 (Code-Q3) D. The structures used for IV. Crop grinding the food. Choose the correct answer from the options given below:

1A-IV, B-II, C-III, D-I

2A-I, B-II, C-III, D-IV

3A-IV, B-III, C-II, D-I

4A-III, B-II, C-IV, D-I

NTA Answer: Option 1(revised_final)

Report an error · Every fix is public: corrections log

Lesson: Animal Tissues

NEET 2024Revised key

Match List I with List II: List I List II A. Unicellular glandular I. Salivary glands epithelium B. Compound epithelium II. Pancreas C. Multicellular glandular III. Goblet cells of alimentary canal epithelium D. Endocrine glandular IV. Moist surface of buccal cavity epithelium Choose the correct answer from the options given below:

1A-II, B-I, C-III, D-IV

2A-IV, B-III, C-I, D-II

3A-III, B-IV, C-I, D-II

4A-II, B-I, C-IV, D-III

NTA Answer: Option 3(revised_final)

Report an error · Every fix is public: corrections log

Given below are two statements : Statement I : Endarch and exarch are the terms often used for describing the position of secondary xylem in the plant body. Statement II : Exarch condition is the most common feature of the root system. In the light of the above statements, choose the correct answer from the options given below:

NEET 2023

1Both Statement I and Statement II are false

2Statement I is correct but Statement II is false

3Statement I is incorrect but Statement II is true

4Both Statement I and Statement II are true

NTA Answer: Option 3(final)

Report an error · Every fix is public: corrections log

Axile placentation is observed in

NEET 2023

1China rose, Beans and Lupin

2Tomato, Dianthus and Pea

3China rose, Petunia and Lemon

4Mustard, Cucumber and Primrose

NTA Answer: Option 3(final)

Report an error · Every fix is public: corrections log

Family Fabaceae differs from Solanaceae and Liliaceae. With respect to the stamens, pick out the characteristics specific to family Fabaceae but not found in Solanaceae or Liliaceae.

NEET 2023

1Polyadelphous and epipetalous stamens

2Monoadelphous and Monothecous anthers

3Epiphyllous and Dithecous anthers

4Diadelphous and Dithecous anthers

NTA Answer: Option 4(final)

Report an error · Every fix is public: corrections log

Given below are two statements : Statement I : The forces generated transpiration can lift a xylem-sized column of water over 130 meters height. Statement II : Transpiration cools leaf surfaces sometimes 10 to 15 degrees evaporative cooling. In the light of the above statements, choose the most appropriate answer from the options given below :

NEET 2023

1Both Statement I and Statement II are incorrect

2Statement I is correct but Statement II is incorrect

3Statement I is incorrect but Statement II is correct

4Both Statement I and Statement II are correct

NTA Answer: Option 4(final)

Report an error · Every fix is public: corrections log

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R : Assertion A : Late wood has fewer xylary elements with narrow vessels. Reason R : Cambium is less active in winters. In the light of the above statements, choose the correct answer from the options given below :

NEET 2023

1Both A and R are true but R is NOT the correct explanation of A

2A is true but R is false

3A is false but R is true

4Both A and R are true and R is the correct explanation of A

NTA Answer: Option 4(final)

Report an error · Every fix is public: corrections log

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R : Assertion A : A flower is defined as modified shoot wherein the shoot apical meristem changes to floral meristem. Reason R : Internode of the shoot gets condensed to produce different floral appendages laterally at successive node instead of leaves. In the light of the above statements, choose the correct answer from the options given below :

NEET 2023

1Both A and R are true but R is NOT the correct explanation of A

2A is true but R is false

3A is false but R is true

4Both A and R are true and R is the correct explanation of A

NTA Answer: Option 4(final)

Report an error · Every fix is public: corrections log

Identify the correct statements: A. Lenticels are the lens-shaped openings permitting the exchange of gases. B. Bark formed early in the season is called hard bark. C. Bark is a technical term that refers to all tissues exterior to vascular cambium. D. Bark refers to periderm and secondary phloem. E. Phellogen is single-layered in thickness. Choose the correct answer from the options given below:

NEET 2023

1A and D only

2A, B and D only

3B and C only

4B, C and E only

NTA Answer: Option 1(final)

Report an error · Every fix is public: corrections log

Lesson: Animal Tissues

NEET 2023

Given below are two statements: Statement I: Ligaments are dense irregular tissue. Statement II: Cartilage is dense regular tissue. In the light of the above statements, choose the correct answer from the options given below:

1Both Statement I and Statement II are false

2Statement I is true but Statement II is false

3Statement I is false but Statement II is true

4Both Statement I and Statement II are true

NTA Answer: Option 1(final)

Report an error · Every fix is public: corrections log

Lesson: Frog Anatomy

NEET 2023

Which of the following is characteristic feature of cockroach regarding sexual dimorphism?

1Presence of anal styles

2Presence of sclerites

3Presence of anal cerci

4Dark brown body colour and anal cerci

NTA Answer: Option 1(final)

Report an error · Every fix is public: corrections log

Lesson: Animal Tissues

NEET 2023

Match List I with List II. List I List II A. Mast cells I. Ciliated epithelium B. Inner surface of bronchiole II. Areolar connective tissue C. Blood III. Cuboidal epithelium D. Tubular parts of nephron IV. Specialised connective tissue Choose the correct answer from the options give below:

1A-II, B-III, C-I, D-IV

2A-II, B-I, C-IV, D-III

3A-III, B-IV, C-II, D-I

4A-I, B-II, C-IV, D-III

NTA Answer: Option 2(final)

Report an error · Every fix is public: corrections log

Lesson: Anatomy Dicot Monocot

NEET 2022

Read the following statements about the vascular bundles : (a) In roots, xylem and phloem in a vascular bundle are arranged in an alternate manner along the different radii. (b) Conjoint closed vascular bundles do not possess cambium (c) In open vascular bundles, cambium is present in between xylem and phloem (d) The vascular bundles of dicotyledonous stem possess endarch protoxylem (e) In monocotyledonous root, usually there are more than six xylem bundles present Choose the correct answer from the options given below :

1(a), (c), (d) and (e) Only

2(a), (b) and (d) Only

3(b), (c), (d) and (e) Only

4(a), (b), (c) and (d) Only

NTA Answer: Option 3(final)

Report an error · Every fix is public: corrections log

The flowers are Zygomorphic in: (a) Mustard (b) Gulmohar (c) Cassia (d) Datura (e) Chilly Choose the correct answer from the options given below:

NEET 2022

1(c), (d), (e) Only

2(a), (b), (c) Only

3(b), (c) Only

4(d), (e) Only

NTA Answer: Option 3(final)

Report an error · Every fix is public: corrections log

In old trees the greater part of secondary xylem is dark brown and resistant to insect attack due to : (a) secretion of secondary metabolities and their deposition in the lumen of vessels. (b) deposition of organic compounds like tannins and resins in the central layers of stem. (c) deposition of suberin and aromatic substances in the outer layer of stem. (d) deposition of tannins, gum, resin and aromatic substances in the peripheral layers of stem. (e) presence of parenchyma cells, functionally active xylem elements and essential oils. Choose the correct answer from the options given below:

NEET 2022

1(b) and (d) Only

2(a) and (b) Only

3(c) and (d) Only

4(d) and (e) Only

NTA Answer: Option 2(final)

Report an error · Every fix is public: corrections log

Lesson: Morphology Root Stem

NEET 2022

Identify the correct set of statements : (a) The leaflets are modified into pointed hard thorns in Citrus and Bougainvillea (b) Axillary buds form slender and spirally coiled tendrils in cucumber and pumpkin (c) Stem is flattened and fleshy in Opuntia and modified to perform the function of leaves (d) Rhizophora shows vertically upward growing roots that help to get oxygen for respiration (e) Subaerially growing stems in grasses and strawberry help in vegetative propagation Choose the correct answer from the options given below :

1(a), (b), (d) and (e) Only

2(b) and (c) Only

3(a) and (d) Only

4(b), (c), (d) and (e) Only

NTA Answer: Option 4(final)

Report an error · Every fix is public: corrections log

Which one of the following plants shows vexillary aestivation and diadelphous stamens?

NEET 2022

1Solanum nigrum

2Colchicum autumnale

3Pisum sativum

4Allium cepa

NTA Answer: Option 3(final)

Report an error · Every fix is public: corrections log

“Girdling Experiment” was performed by Plant Physiologists to identify the plant tissue through which:

NEET 2022

1osmosis is observed

2water is transported

3food is transported

4for both water and food transportation

NTA Answer: Option 3(final)

Report an error · Every fix is public: corrections log

The anatomy of springwood shows some peculiar features. Identify the correct set of statements about springwood. (a) It is also called as the earlywood (b) In spring season cambium produces xylem elements with narrow vessels (c) It is lighter in colour (d) The springwood along with autumnwood shows alternate concentric rings forming annual rings (e) It has lower density Choose the correct answer from the options given below :

NEET 2022

1(c), (d) and (e) Only

2(a), (b), (d) and (e) Only

3(a), (c), (d) and (e) Only

4(a), (b) and (d) Only

NTA Answer: Option 3(final)

Report an error · Every fix is public: corrections log

Lesson: Animal Tissues

NEET 2022

Which of the following is not a connective tissue?

1Neuroglia

2Blood

3Adipose tissue

4Cartilage

NTA Answer: Option 1(final)

Report an error · Every fix is public: corrections log

Lesson: Animal Tissues

NEET 2022

Match List-I with List-II List-I List-II (a) Bronchioles (i) Dense Regular Connective Tissue (b) Goblet Cell (ii) Loose Connective Tissue (c) Tendons (iii) Glandular Tissue (d) Adipose Tissue (iv) Ciliated Epithelium Choose the correct answer from the options given below:

1(a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)

2(a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)

3(a) - (i), (b) - (ii), (c) - (iii), (d) - (iv)

4(a) - (ii), (b) - (i), (c) - (iv), (d) - (iii)

NTA Answer: Option 2(final)

Report an error · Every fix is public: corrections log

Diadelphous stamens are found in

NEET 2021

1China rose and citrus

2China rose

3Citrus

4Pea

NTA Answer: Option 4(final)

Report an error · Every fix is public: corrections log

Match List-I with List-II. Lenticels Cork cambium Secondary cortex Cork Phellogen Suberin deposition Exchange of gases Phelloderm List-I List-II (a) (b) (c) (d) (i) (ii) (iii) (iv) Choose the correct answer from the options given below. (a) (b) (c) (d)

NEET 2021

1(iv) (ii) (i) (iii)

2(iv) (i) (iii) (ii)

3(iii) (i) (iv) (ii)

4(ii) (iii) (iv) (i)

NTA Answer: Option 3(final)

Report an error · Every fix is public: corrections log

Lesson: Anatomy Dicot Monocot

NEET 2021

Select the correct pair.

1Loose parenchyma cells - Spongy rupturing the epidermis parenchyma and forming a lens shaped opening in bark

2Large colorless empty - Subsidiary cells cells in the epidermis of grass leaves

3In dicot leaves, vascular - Conjunctive bundles are surrounded tissue by large thick-walled cells

4Cells of medullary rays - Interfascicular that form part of cambium cambial ring

NTA Answer: Option 4(final)

Report an error · Every fix is public: corrections log

Match Column-I with Column-II (a) %⚥ K₍₅₎ C₁₊₂₊₍₂₎ A₍₉₎₊₁ G̲₁ — (i) Brassicaceae; (b) ⊕⚥ K₍₅₎ C͡₍₅₎A₅ G̲₂ — (ii) Liliaceae; (c) ⊕⚥ P͡₍₃₊₃₎ A₃₊₃ G̲₍₃₎ — (iii) Fabaceae; (d) ⊕⚥ K₂₊₂ C₄ A₂₋₄ G̲₍₂₎ — (iv) Solanaceae. Select the correct answer from the options given below. (a) (b) (c) (d)

NEET 2021

1(iv) (ii) (i) (iii)

2(iii) (iv) (ii) (i)

3(i) (ii) (iii) (iv)

4(ii) (iii) (iv) (i)

NTA Answer: Option 2(final)

Report an error · Every fix is public: corrections log

Lesson: Frog Anatomy

NEET 2021

Which of the following characteristics is incorrect with respect to cockroach?

110th abdominal segment in both sexes, bears a pair of anal cerci

2A ring of gastric caeca is present at the junction of midgut and hind gut

3Hypopharynx lies within the cavity enclosed by the mouth parts

4In females, 7th-9th sterna together form a genital pouch

NTA Answer: Option 2(final)

Report an error · Every fix is public: corrections log

Identify the incorrect statement.

NEET 2020

1Due to deposition of tannins, resins, oils etc., heart wood is dark in colour.

2Heart wood does not conduct water but gives mechanical support.

3Sapwood is involved in conduction of water and minerals from root to leaf.

4Sapwood is the innermost secondary xylem and is lighter in colour.

NTA Answer: Option 4(final)

Report an error · Every fix is public: corrections log

Report an error · Every fix is public: corrections log

NEET 2020

Ray florets have :

1Half inferior ovary

2Inferior ovary

3Superior ovary

4Hypogynous ovary

NTA Answer: Option 2(final)

Lesson: Morphology Root Stem

NEET 2020

The roots that originate from the base of the stem are :

1Lateral roots

2Fibrous roots

3Primary roots

4Prop roots

NTA Answer: Option 2(final)

Report an error · Every fix is public: corrections log