Structural Organization in Animals- NEET Previous Year Questions with Solutions and Weightage

The topic Structural Organization in Animals is included in the NEET Biology syllabus and covers animal tissue organization, their role, and the morphology of selected animals. It enables students to comprehend animal tissue functions and organ systems. Different types of tissues will be discussed, specifically epithelial tissues, connective tissues, muscle tissues, and nervous tissues. Furthermore, there will be a focus on various organ systems in different animals including the frog, cockroach, and earthworm.

This unit covers around 5-7% of total marks in the examination. Based on previous years, you could be asked 2-3 questions from this topic, which can provide support for your overall mark. These questions generally ask for how much you know and understand about animal tissues, their functions, and the anatomical structure aspects of different animals.

There are key topics such as tissue types (epithelial, connective, muscular, and nervous tissues) that are commonly asked as well as organ systems. In order to be successful, the practical task is to master and fully understand these topics and practice NEET previous years questions (PYQs). This will help you understand both the theory of what has been taught and the application of what you have learned in a more mapped-out context and the anatomical structures of organisms, which will help you in being successful in the examination.

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• Download NEET UG LAST 10 YEARS Question Paper
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Here are some important and mostly asked questions of Structural Organization in Animals in NEET exam based on NEET Previous Year Questions

Question 1:

In cockroach, excretion is brought about by

A. Phallic gland

B. Uricose gland

C. Nephrocytes

D. Fat body

E. Collaterial glands

[NEET (UG) - 2023]

1. A, B and E only
2. B, C and D only
3. B and D only
4. A and E only

View Solution

Question 2:

Match List I with List II. [NEET 2023]

Choose the correct answer from the options given below:

1. A-I, B-II, C-IV, D-III
2. A-III, B-II, C-IV, D-I
3. A-II, B-I, C-IV, D-III
4. A-I, B-II, C-III, D-IV

View Solution

Question 3:

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

[NEET (UG) - 2024]

1. 5th segment
2. 10th segment
3. 8th and 9th segment
4. 11th segment

View Solution

Question 4:

Following are the statements about prostomium of earthworm.

(a) It serves as a covering for mouth.

(b) It helps to open cracks in the soil into which it can crawl.

(c) It is one of the sensory structures.

(d) It is the first body segment.

Choose the correct answer from the options given below

[NEET (UG) - 2021]

1. (b) and (c) are correct
2. (a), (b) and (c) are correct
3. (a), (b) and (d) are correct
4. (a), (b), (c) and (d) are correct

View Solution

Question 5:

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

[NEET (UG) - 2023]

1. Presence of anal styles
2. Presence of sclerites
3. Presence of anal cerci
4. Dark brown body colour and anal cerci

View Solution

Question 6:

Identify the types of cell junctions that help to stop the leakage of the substances across a tissue and facilitation of communication with neighboring cells via rapid transfer of ions and molecules

[NEET (UG) - 2021]

1. Adhering junctions and Gap junctions, respectively
2. Gap junctions and Adhering junctions, respectively
3. Tight junctions and Gap junctions, respectively
4. Adhering junctions and Tight junctions, respectively

View Solution

Question 7:

Which of the following characteristics is incorrect with respect to cockroach ? [NEET 2021]

1. A ring of gastric caeca is present at the junction of midgut and hind gut.
2. Hypopharynx lies within the cavity enclosed by the mouth parts.
3. In females, 7th−9th sterna together form a genital pouch.
4. 10th abdominal segment in both sexes, bears a pair of anal cerci.

View Solution

Question 8:

Identify the types of cell junctions that help to stop the leakage of the substances across a tissue and facilitation of communication with neighboring cells via rapid transfer of ions and molecules

[NEET (UG) - 2021]

1. Adhering junctions and Gap junctions, respectively
2. Gap junctions and Adhering junctions, respectively
3. Tight junctions and Gap junctions, respectively
4. Adhering junctions and Tight junctions, respectively

View Solution

Question 9:

If the head of cockroach is removed, It may live for few days because:

[NEET (UG) - 2020]

1. the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.
2. the cockroach does not have nervous system
3. the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.
4. the head holds a 1/3 rd of a nervous system while the rest is situated along the dorsal part of its body.

View Solution

Question 10:

Cuboidal epithelium with brush border of microvilli is found in:

[NEET (UG) - 2020]

1. lining of intestine
2. ducts of salivary glands
3. proximal convoluted tubule of nephron
4. eustachian tube

View Solution

Question 11:

The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in:

[NEET (UG) - 2019]

1. Bile duct and Bronchioles
2. Fallopian tubes and Pancreatic duct
3. Eustachian tube and Salivary duct
4. Bronchioles and Fallopian tubes

View Solution

Question 12:

Which type of tissue correctly matches with its locations ? [NEET 2016]

1. 1
2. 2
3. 3
4. 4

View Solution

Question 13:

The body cells in cockroach discharge their nitrogenous waste in the haemolymph mainly in the form of [NEET 2015]

1. urea
2. calcium carbonate
3. ammonia
4. potassium urate

View Solution

Question 14:

Which one of the following is one of the paths followed by air or O during respiration in the adult male Periplaneta americana as it enters the animal body? [NEET 2013]

1. Spiracle in metathorax, trachea, tracheloes, oxygen diffuses into cells
2. Mouth, bronchial tube, trachea, oxygen enters cells
3. Spiracles in prothorax, tracheole^, trachea, oxygen diffuses into cells.
4. Hypopharynx, mouth, pharynx, trachea, tissues

View Solution

Question 15:

Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth:

[NEET (UG) - 2019]

1. Pharynx → Oesophagus → Gizzard → Ileum → Crop → Colon → Rectum
2. Pharynx → Oesophagus → Ileum → Crop → Gizzard → Colon → Rectum
3. Pharynx → Oesophagus → Crop → Gizzard → Ileum → Colon → Rectum
4. Pharynx → Oesophagus → Gizzard → Crop → Ileum → Colon → Rectum

View Solution

NEET Biology Paper Pattern

The NEET Biology paper is designed to test a student's knowledge of Botany and Zoology at the senior secondary level. It consists of 90 questions, equally distributed between Botany and Zoology, carrying a huge weightage in the total score.

• Total Questions: 90
  • Botany: 45
  • Zoology: 45
• Total Marks: 360
• Question Type: Multiple Choice Questions (MCQs)
• Marking Scheme:
  • +4 marks for each correct answer
  • -1 mark for each incorrect answer
  • 0 marks for unanswered questions

Chapter-Wise Distribution and Weightage Analysis

There are 90 questions in the Biology section of the NEET UG 2025 exam, which are split equally between the Botany and Zoology sections. Each section comprises 45 questions which makes the Biology section a very scoring part of the NEET exam/

Botany (45 Questions):

This section covers the plant kingdom as well as the study of plants and different physiological processes. Questions from the following subjects are commonly found in this section:

Living Organism Diversity (14%):

The classification of living organisms, specifically the kingdom of plants, and its major groups—algae, fungi, bryophytes, pteridophytes, gymnosperms, and angiosperms—as well as the traits of these groups are the primary focus of this chapter. Knowledge of plant diversity and biological classification is helpful in this section.

Plant Structural Organization (9%):

The meristematic or permanent plant tissues, the organs' functions, the anatomy (the arrangement of stems, roots, and leaves), and a thorough analysis of plant morphology are all covered.

Cell: The Unit of Life (9%):

Cell structure, organelle types, biomolecules, and the processes of cell division (mitosis and meiosis) are the main topics of this chapter. As we proceed through this section, it is critical to comprehend cell activity, including the production of proteins (ribosomes) and energy in cells (mitochondria).

Plant Physiology (6%):

This chapter focuses on the physiological responses of plants, including photosynthesis, respiration, growth, and development. Understanding the mechanisms underlying plant functions, such as gas exchange and water and nutrient uptake, is essential for this section.

Human Physiology (20%):

Even though they might seem more relevant to zoology, some aspects of human physiology, such as comparative physiology and plant-animal interactions, are found in the botany sections. There is discussion of issues related to digestion, excretion, respiration, and coordination.

Zoology Section (45 Questions):

The anatomy, physiology, behavior, and interactions between animals and their surroundings are covered in the zoology section. The chapter's main subjects are:

Reproduction: 9%

The development of new organisms, human reproduction, asexual and sexual reproduction, and reproductive health are all covered in this chapter. Human reproductive organs, gametogenesis, and fertilization are key ideas.

Evolution and Genetics (18%):

This chapter, which covers inheritance principles, Mendelian genetics, molecular genetics, and the evolution process, is arguably one of the most significant in all of Zoology. It calls for knowledge of genetic diversity, inheritance patterns, and natural selection.

Biology and Human Welfare (9%):

Concerns issues related to human disease and illness, such as major diseases like malaria, tuberculosis, and AIDS. It also deals with the influence of microorganisms on human well-being, and methods of improving food production and food security.

Biotechnology and Its Applications (4%):

This chapter gives an introduction to biotechnology principles and applications such as recombinant DNA technology, genetic engineering, and application in medicine and agriculture.

Ecology and Environment (10%):

This discusses biodiversity, population dynamics, ecosystem principles, and environmental issues. Food chains, biogeochemical cycles, conservation strategies, and the impacts of human activity on the environment are among the subjects that will be discussed.

Kingdom of Animals (13%).

It addresses the classification of animals into broad phyla, including chordates, mollusks, and arthropods. It also covers the diversity of the animal kingdom and their unique characteristics, morphology, and roles.

Animal Structural Organization (9%):

This topic focuses on the anatomy and physiology of animal systems, such as the digestive, excretory, circulatory, and respiratory systems. The study of animal tissues and the comparative anatomy of various animal species are also covered.

Detailed Topic-Wise Weightage for Biology in NEET UG 2025

Here’s the detailed topic-wise weightage for Biology in NEET UG 2025, divided into Class 11 and Class 12 subjects, along with the expected number of questions from each topic.

Class 11 Topics

Class 12 Topics

Key Insights:

• Class 11 topics mostly focus on foundational biology concepts such as plant physiology, cell structure, and diversity of organisms.
• Class 12 topics build upon these foundations with a focus on human physiology, genetics, biotechnology, and more advanced concepts such as ecology and reproduction.

Also Read: NEET Chapter Wise Weightage

NEET Question Paper 2024 PDF with Answer Key and Solution

NEET 2024 Question Paper PDF Code R

NEET 2024 Question Paper PDF Code Q

NEET 2024 Question Paper PDF Code T

NEET 2024 Question Paper PDF Code S

NEET Question Paper 2023 PDF Download with Solution

Here are NEET 2023 question paper of all the sets:

NEET Question Paper 2023 Set E

NEET 2023 Question Paper Set F

Question paper pdfs for F1, F2, F3, F4, F5, and F6 are available for download.

NEET 2023 Question Paper Set G

Question paper pdfs for G1, G2, G3, G4, G5, and G6 are available for download.

NEET 2023 Question Paper Set H

Question paper pdfs for H1, H2, H3, H4, H5, and H6 are available for download.

NEET Question Paper 2022 in English

NEET 2022 Question Paper PDF for all paper codes is available for download.

NEET Question Paper 2022 Set Q

NEET 2022 question paper pdfs for Q1, Q2, Q3, Q4, Q5, and Q6 are available for download.

NEET Question Paper 2022 Set R

NEET Question Paper 2022 Set S

NEET Question Paper 2022 Set T

NEET Question Paper 2021 in English

It was for the first time in 2021 that NTA conducted NEET in 13 languages. Given below are the links to download question paper with solutions PDF in all the 13 languages for all paper codes.

NEET Question Paper 2021 Set M

NEET Question Paper 2021 Set N

NEET Question Paper 2021 Set O

NEET Question Paper 2021 Set P

NEET Question Paper 2020 in English- Set E, F, G, H

Frequently Asked Questions

Q1. Is Structural organization in animals included in NEET?

Answer. Indeed, the NEET syllabus includes the chapter "Structural Organization in Animals." The organization of tissues, their types (epithelial, connective, muscular, and nervous tissues), and the anatomical study of creatures like frogs, cockroaches, and earthworms are among the fundamental subjects it covers.

Q2. What is the weightage of structural organization in animals in NEET?

Answer. About 5% to 7% of the entire Biology section of the NEET exam is from "Structural Organization in Animals." This usually corresponds to two or three questions.

Q3. Is earthworm in NEET Syllabus 2025?

Answer. Indeed, Earthworm is covered in the NEET 2025 curriculum. It is covered in the chapter on "Structural Organization in Animals," which covers the anatomy and physiology of various creatures. Particularly, the internal structure, digestive, circulatory, and excretory systems of earthworms are frequently studied. Since the Earthworm is commonly included in NEET questions about animal anatomy, it is imperative to comprehend its body structure.

Q4. Is cockroach included in NEET?

Answer. Indeed, the cockroach is covered in the NEET curriculum. Its anatomy, physiology, and organ systems are discussed in the chapter on "Structural Organization in Animals." It is crucial to be familiar with the specifics of the cockroach's internal structure because these elements are regularly tested in NEET.

Q5. Is Structural organization in animals important for NEET?

Answer. Indeed, one of the key topics for NEET is Animal Structural Organization. It is a crucial component of the biology curriculum and accounts for roughly 2-3 questions, or 5–7% of the exam's overall weightage. Important ideas about animal tissues, including their types (epithelial, connective, muscular, and nervous tissues), as well as the anatomy of creatures like cockroaches, frogs, and earthworms, are covered in this topic.

Q6. Which chapter of biology has more weightage in NEET?

Answer. Human Physiology is the most important chapter in the NEET Biology syllabus. It usually accounts for 20–25% of the exam's final score. This chapter covers processes like respiration and reproduction as well as the digestive, circulatory, excretory, and neurological systems. Since this chapter frequently includes a number of questions in both theory and application-based formats, mastering it is essential to performing well on the NEET. Cell Structure and Function, Reproduction, and Ecology are other crucial chapters that carry a lot of weight.

Related Articles:

• Human Physiology- NEET Previous Year Questions with Solutions and Weightage
• Ecology- NEET Previous Year Questions with Solutions and Weightage

Q7. How many biology questions are there in NEET?

Q8. What is the morphology of a cockroach NEET?