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1. The components that are necessary for our body are called _________.
A. Nutrients
B. Pulses
C. Minerals
D. Vitamins
ANSWER: A.Nutrients
SOLUTION :These components are called nutrients. The major nutrients in our food are named carbohydrates, proteins, fats, vitamins and minerals. In addition, food contains dietary fibres and water which are also needed by our body.
2. Green colour of the plant is due to the presence of _________.
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Chlorophyll
ANSWER:D.Chlorophyll
SOLUTION:The green colour of the plant is due to the presence of chlorophyll pigment which is green in colour. Chlorophyll helps in photosynthesis.
3. Name the plant which traps and feeds on insects _______.
A. Pitcher plant
B. Rose
C. China Rose
D. Cuscuta
ANSWER :A.Pitcher plant
SOLUTION:The plant which traps and feeds on insects is pitcher plant.
4. Which of these are Autotrophs?
A. All animals
B. All plants
C. Green plants
D. Unicellular organisms
ANSWER: C.Green plants
SOLUTION: Green plants are autotrophs, which means they can produce their own food using light, water, carbon dioxide, or other chemicals.
5. Which of these is not necessary for photosynthesis?
A. Chlorophyll
B. Nitrogen
C. Light
D. Carbon dioxide
ANSWER:B.Nitrogen
SOLUTION:The substance not essential for photosynthesis is nitrogen among given options.
6. Which of these is saprophyte ?
A. Dodder
B. Pitcher plant
C. Venus flytrap
D. Mushroom
ANSWER: D.Mushroom
SOLUTION:Yeast and mushroom are saprophytic organisms. Saprophytes feed on dead and decaying organisms.
7. When iodine is added to starch, it becomes ______in colour.
A. Blue – black
B. Green
C. Red – brown
D. Orange
ANSWER:A.Blue – black
SOLUTION :
When the starch comes in contact with iodine it will show blue-black color. This blue-black color is the color of the starch iodide complex.
8. Which of the following raw material is available in the air for Photosynthesis?
A. Oxygen
B. Hydrogen
C. Nitrogen
D. Carbon dioxide
ANSWER: D.Carbon dioxide
SOLUTION:Carbon dioxide is raw material is available in the air for photosynthesis.
9. Which of the following organisms gets its food from dead and decaying matter ?
A. Fungi
B. Amoeba
C. Algae
D. Pitcher plant
ANSWER:A.Fungi
SOLUTION: A. Fungi is the organism that gets its food from dead and decaying matter.
10. Which element is needed in addition to carbon, hydrogen and oxygen to make proteins?
A. Calcium
B. Phosphorus
C. Potassium
D. Nitrogen
ANSWER: D.Nitrogen
SOLUTION:
The elements that make up proteins are carbon , hydrogen , oxygen as well as nitrogen .