Science [1 Mark Questions]

What is the general name of chemical substances which bring about control and coordination in plants?

Name, the disease caused by the deficiency of thyroxine hormone in the body.

Name one hormone secreted by the pituitary gland.

What is cranium? What is its function?

Which part of the brain maintains posture and balance of the body?

What are the two parts of the vertebrate nervous system?

When you smell a favourite food your mouth begins to water (that is, you secrete saliva). Write down what the following are examples of:
The cells in your nasal passages which perceive the smell.

Name the plant hormones which are responsible for the following effects:
Closing of stomata.

Name the three types of nerves which constitute the peripheral nervous system.

Name the disease which occurs in adults due to the deficiency of iodine in the diet. What is the main symptom of this disease?

Name the plant hormones which are responsible for the following effects:
Opening of stomata.

What does a root do in response to gravity? What is this phenomenon known as?

Which plant hormone makes a stem (or shoot) bend towards light?

Which halogen element is necessary for the making of thyroxine hormone by the thyroid gland?

If sugar is detected in the urine of a person, name the disease he is suffering from.

Which plant hormone is responsible for the wilting and falling of leaves?

Name the structural and functional unit of nervous system.

What part does the diet play in helping us to have a healthy thyroid gland?

Which part of the eye contains cells which are sensitive to light?

Name the plant hormones which are responsible for the following effects:
Bending of stem towards light.

Name one gland:
Which acts only as an endocrine gland.

Where are hormones made in the human body?

Name the plant part:

1. Which bends in the direction of gravity but away from light.
2. Which bends towards light but away from the force of gravity.

Which hormone:
Gives boys a deep voice?

Give one example of the movement of a plant part which is caused by the loss of water (or migration of water).

Give three examples of reflex actions.

What does a stem (or shoot) do in response to gravity? What is this phenomenon known as?

Name two systems which taken together perform the functions of control and coordination in human beings.

Name one gland each:
Which acts both as an endocrine gland as well as an gxocrine gland.

To which directional stimuli do:

1. Roots respond?
2. Shoots respond?

Which one term in the following includes the other three?
Adrenalin, insulin, hormone, thyroxine, estrogen.

Which one term in the following includes the other three?
Thyroid, ductless gland, thymus, pituitary, ovary.

Why are some patients of diabetes treated by giving injections of insulin?

What is the scientific name of sensitive plant?

What is the long fibre of a neuron known as?

Give the scientific terms used to represent the following:
Bending of a shoot towards light.

If we happen to touch a hot object unknowingly, we immediately pull back our hand. What is this type of action known as?

Name one gland each:
Which acts only as an exocrine gland.

Give the scientific terms used to represent the following:
Growing of roots towards the earth.

Name one example of the movement of a plant part which is very quick and can be observed easily.

Give the scientific terms used to represent the following:
Winding of tendril around a support.

What does a Mimosa pudica plant do in response to touch? What is this phenomenon known as?

Give the scientific terms used to represent the following:
Bending of roots towards water.

When you smell a favourite food your mouth begins to water (that is, you secrete saliva). Write down what the following are examples of:
The smell of the food.

List three ways in which neurons are similar to other cells.

Why do you need iodine in your diet?

What substances are made by endocrine glands?

Name the plant hormones which are responsible for the following effects:
Falling of leaves.

Which hormone:
gives girls soft skin?

What does a stem (or shoot) do in response to light? What is this phenomenon known as?