CBSE Important Questions

Biology (Control and Coordination)

1. Who introduced the term Hormones?

2. In Plants:

1. Name the two substances which are responsible for the control and coordination in plants.
2. What is the function of Gibberellins, Ethene and Auxins?
3. What are Phytohormones? Name any two.
4. What is the difference between photoperiodism and phototropism?
5. What are nastic movements? Give one example.
6. What are the different Hormones found in Plants and their functions?

3. In Animals:

1. Draw a diagram of nervous system of an insect. Label the following parts: Brain, Ganglion, and Nerve Chord.
2. Which is the structural and functional unit of nervous system? Describe with the help of a diagram.
3. “Nervous and the hormonal system together perform the function of the control and coordination in the humans”. Justify.
   1. Nervous system:
      1. What are the different types of nervous systems found in human body? Mention the functions of each.
      2. Write the effects of sympathetic and parasympathetic nervous system on the following: a. Heart b. Blood Vessels c. Bronchi d. Eyes e. Gastric Bladder
      3. Draw the schematic diagram of reflex arc. Define reflex action with suitable example.
      4. If the parasympathetic nervous system causes constriction of pupil what will be the effect of sympathetic nervous system.
   2. Brain:
      1. Draw the labeled structure of human brain.
      2. What are the four main parts of the fore brain? Give the function of each part.
      3. What are the three parts of the mid brain and their functions?
      4. Which part of the human brain is responsible for: Intelligence and Memory, Adjustment movement and Posture, Smell?
      5. Give the role of Frontal lobe, temporal, lobe and medulla oblongata.
      6. Name the different lobes found in the fore brain and give their functions.
      7. What is EEG? What is the use of an EEG? Which radiation do they measure?
   3. Endocrine Glands:
   4. Draw the diagram showing endocrine glands in a male body/female body and label: Pituitary, Thyroid, Adrenal, Testis/ovaries, Thalamus, and Hypothalamus.
   5. Name the hormone associated with a) Reduction of blood glucose in the body b) Overall metabolism of the body.
   6. Write the function of testes, ovaries and epidydmis

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Biology Links

• Transportation and Excretion
• Nutrition and Respiration
• Reproduction
• Control and Coordination
• Heredity and Evolution