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Structural Organisation in Animals — NEET MCQs with answers
In multicellular animals a group of similar cells with intercellular substances forms a tissue, and all complex animals are built from only four basic tissue types (epithelial, connective, muscular, neural). These tissues combine in specific patterns to form organs and organ systems. The chapter introduces the morphology and anatomy of the frog as a representative vertebrate.
Topics in this chapter
- 7.1 Organ and Organ System
- 7.2 Frogs
Free practice questions
The central nervous system of the frog consists of the:
- A. brain and endocrine glands
- B. sympathetic and parasympathetic nerves
- C. cranial and spinal nerves
- D. brain and spinal cord
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Answer: D — The nervous system is organised into a central nervous system (brain and spinal cord), a peripheral nervous system and an autonomic nervous system.
NCERT Class 11 Biology · Ch 7 · 7.2 Frogs
According to NCERT, the body of a simple organism like Hydra is made of different types of cells, and the number of cells in each type can be in the:
- A. tens
- B. thousands
- C. exactly one cell of each type
- D. billions
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Answer: B — p.79: the body of Hydra is made of different types of cells and the number of cells in each type can be in thousands. 'Billions' is the figure NCERT gives for the human body; 'tens' and 'one cell of each type' are not stated.
NCERT Class 11 Biology · Ch 7 · 7.1 Organ and Organ System
The excretory system of the frog consists of a pair of kidneys, ureters, cloaca and:
- A. urinary bladder
- B. oviduct
- C. gall bladder
- D. vocal sac
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Answer: A — The excretory system consists of a pair of kidneys, ureters, cloaca and urinary bladder.
NCERT Class 11 Biology · Ch 7 · 7.2 Frogs
Which of the following is NOT an example of an organ mentioned in the text?
- A. Kidney
- B. Stomach
- C. Digestive system
- D. Lung
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Answer: C — Stomach, lung, heart and kidney are organs; the digestive system is an organ system.
NCERT Class 11 Biology · Ch 7 · 7.1 Organ and Organ System
According to NCERT, in the case of plants or microbes the term morphology precisely means:
- A. the study of the morphology of internal organs
- B. the study of both external features and the internal organs together
- C. only the study of form or externally visible features
- D. the study of the cells of a tissue under a microscope
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Answer: C — p.80: morphology refers to study of form or externally visible features; in the case of plants or microbes the term precisely means only this. The study of the morphology of internal organs is what the word anatomy is conventionally used for in animals; the other two meanings are not given.
NCERT Class 11 Biology · Ch 7 · 7.1 Organ and Organ System
The lymphatic system of the frog consists of:
- A. arteries, veins and capillaries
- B. kidneys, ureters and bladder
- C. lymph, lymph channels and lymph nodes
- D. heart, blood vessels and blood
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Answer: C — The lymphatic system consists of lymph, lymph channels and lymph nodes.
NCERT Class 11 Biology · Ch 7 · 7.2 Frogs
Another name for the white blood cells (WBCs) of the frog is:
- A. platelets
- B. erythrocytes
- C. haemocytes
- D. leucocytes
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Answer: D — WBCs are also called leucocytes; RBCs are erythrocytes.
NCERT Class 11 Biology · Ch 7 · 7.2 Frogs
Which of the following statements is INCORRECT regarding the study of body form and structure?
- A. Morphology refers to the study of external features
- B. Anatomy refers to the study of internal organs
- C. Cells of the body show division of labour
- D. Morphology refers to the study of internal organs
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Answer: D — Morphology refers to external features, while anatomy refers to internal organs; the reversed definition is incorrect.
NCERT Class 11 Biology · Ch 7 · 7.1 Organ and Organ System
Frogs belong to which phylum?
- A. Mollusca
- B. Arthropoda
- C. Annelida
- D. Chordata
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Answer: D — Frogs belong to class Amphibia of phylum Chordata.
NCERT Class 11 Biology · Ch 7 · 7.2 Frogs
Which of the following is an example of an organ system?
- A. Lung
- B. Stomach
- C. Digestive system
- D. Heart
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Answer: C — When two or more organs perform a common function, they form an organ system, e.g., digestive system, respiratory system.
NCERT Class 11 Biology · Ch 7 · 7.1 Organ and Organ System
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