General Science Class 9 MCQS

Carbohydrates which digested quickly are called?

1. Starch
2. Protein
3. Mineral
4. Vitamin

Each gram fat supplies the body with about ______ calories.

1. 7
2. 9
3. 10
4. 5

Loss of internal water of plant in the form of vapours from aerial parts of plants is called?

1. Evaporation
2. Respiration
3. Transpiration
4. Photosynthesis

In flowering plants xylem is made up of ____ types of tissues.

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

Root hair is long, thin and tubular structure, it increases surface area which increases the :

1. Rate of absorption of water
2. Rate of photosynthesis
3. Rate of respiration
4. Rate of growth

Opening and closing of stomata is also regulated by :

1. Epidermal cells
2. Guard cells
3. Root hair cells
4. Mesophyll cells

A type of cancer that affects the blood, bone marrow and lymphatic system called?

1. Lymphoma
2. Carcinoma
3. Leukemia
4. Sarcoma

Pumping of blood by the rhythmic pulsation of heart throughout the body is called?

1. Blood pressure
2. Circulation
3. Pulse
4. Heart beat

Relaxation of heart muscles and allowing the chambers to fill with blood called?

1. Diastole
2. Systole
3. Cardiac arrest
4. Heart failure

Dead cells of xylem vessels arranged vertically have empty space inside called?

1. Cell wall
2. Lumen
3. Cytoplasm
4. Chlorophyll