Life processes class 10

Select the incorrect option

• Heterotrophes have chlorophyll pigments

• Heterotrophes belong to first tropic level

• Heterotrophes can convert solar energy to chemical energy

• Heterotrophics are unable to synthesize their food

During photosynthesis O2 is evolved from

• CO2

• Chlorophyll

• Water

• Glucose

The procedure used for cleaning the blood of a person by separating urea is [ answer in lower case]

Which is the main driving force that carries water in xyle

• Transpiration

• Root pressure

• Diffusion

• Osmosis

In which of the following groups of organisms are food materials broken down outside the body and absorbed?

• Yeast , saprophytes,plants

• Yeast, bread mold, mushroom

• Paramecium, amoeba, cuscuta

• Cuscuta, lice, tapeworm

How do these fungi obtain nutrition?

• By eating the bread on which it is growing

• By using nutrients from the bread to prepare their own food

• By breaking down the nutrients of bread and then absorbing them

• By allowing other organisms to grow on the bread and then consuming them

The opening and closing of the stomatal pore depend upon:

(a) Oxygen

(b) Temperature

(c) Water in the guard cells

(d) Concentration of CO2

• A

• B

• C

• D

The given image shows how Amoeba obtains nutrition.

How is this process advantageous for amoeba?

(a) Capturing food takes less time

(b) Complex food can be digested easily

(c) More amount of food can be consumed

(d) Fast distribution of nutrition within the body

• A

• B

• C

• D

Which of the following option shows the transport of oxygen to the cell correctly?

(a) Lungs →pulmonary vein →left atrium →left ventricle →aorta → body cells

(b) Lungs →pulmonary vein →right atrium →right ventricle → aorta → body cells

(c) Lungs →pulmonary artery →left atrium → left ventricle → vena cava → body cells

(d) Lungs →pulmonary artery →right atrium → right ventricle→ vena cava → body cells

• A

• B

• C

• D

How is food transported from the phloem to the tissues according to plants’ needs?

(a) Food is transported along with the water in the plant’s body

(b) Food is transported in only one direction, like water in the plant body through the xylem

(c) Food is transported from a region with a low concentration to a higher concentration

(d) Food is transported from the region where it is produced to other parts of the plants

• A

• B

• C

• D