Contribute & Test Your Skills
- Chemical Reactions & Equations
- Acid, Bases & Salts
- Metals & Non Metals
- Carbon & Its Compounds
- Periodic Classification of Elements
- Life Processes
- Respiration
- Control and Coordination
- How Do Organism Reproduce
- Heredity and Evolution
- Light: Reflection and Refraction
- Human Eye and Colorful World
- Electricity
- Magnetic Effect of Electric Current
- Sources of Energy
- Our Environment
- Management of Natural Resources
Popular Questions
- Assertion : Plants lack the nervous Reason : It is so because of harmones
- A plant in the laboratory is given increased dose of a hormone, which promotes the development of seedless fruits.
- A child is frightened by a loud noise and shouts for help. In which order, the different types of neurons involved will act?
- Assertion : Abscisic acid is Reason : It is a growth inhibitor
- A boy runs on seeing a stray dog. His breathing rate becomes very fast and blood pressure also increases
- Name any two types of tropic movements.
- Observe the figure given below. In the figure, some parts are labelled as P, Q, R, S and T.
- Assertion : Cytokinins are present Reason : Cytokinins are responsible for
- Assertion : Endocrine glands are called ductless glands. Reason : These glands direct pour their secretion into the blood.
- Adrenal glands are located on top of each kidney.
- Name two tissues, which provide control and coordination in animals.
- With the help of a labelled diagram, illustrate the pathway of response when someone pricks in your hand with a pin.
- Why adrenaline is known as emergency hormone?
- Growth of pollen tube towards
- Name the source and target organs of adrenaline.
- Give the exact location and function of cerebellum.
- Nerves and hormones both are used to control processes within the body. Using examples
- Following are the two examples of plant movement.
- Assertion : Reflex actions are Reason : These actions are controlled by brain
- Adrenaline hormone is secreted in the body during emergency situations. What would be the effects of increased concentration of ad..
- Nervous and hormonal systems together perform the function of control and coordination in human beings. Justify the statement.
- Name two components of central nervous system in humans.
- The given diagrams shows some of the features of human skin.
- Give any one function performed by our brain.
- A young green plant receives sunlight from direction only.
- Some situations in our day to day life require quick response from our body. Or What are reflex actions? Give two examples. Explai..
- Give an example of a plant hormone that promotes growth.
- Design an experiment to demonstrate hydrotropism.
- What are the major parts of the brain? Mention the functions of different parts.
- Name the sensory receptors found in the nose and on the tongue.
- The diagram shows a reflex arc in which a bee sting causes the arm to be moved quickly.
- Give some examples of involuntary actions.
- Deficiency of which hormone causes diabetes?
- Write one function of each (i) Auxin (ii) Gibberellins
- All information about our environment is detected by specialised cells.
- Assertion : Thyroxine is secreted by thyroid gland. Reason : Its deficiency leads to diabetes.
- (i) A nerve input signal travelled only upto the spinal cord (ii) Draw a nerve pathway for the above action and suggest
- Hypersecretion of growth hormone causes
- Which part of the human brain is most well-developed?
- Name one plant growth hormone, which makes the seed dormant during extremely dry season.
