LIFE PROCESSES

Select the correct statement -

• A) Hetrotrophs make their food

• B) Heterotrophs utilize solar energy to make food

• C) Heterotrophs do not make their own food

• D) Heterotrophs are capable of converting carbon dioxide and water into carbohydrates

Which of the following statements about autotrophs is incorrect ?

• They synthesize carbohydrates by using carbon dioxide , water in presence of sunlight and chlorophyll

• They store carbohydrates in form of starch

• They convert carbon dioxide and water into carbohydrates in the absence of sunlight

• They form the first trophic level in food chain

A few drops of iodine solution were added to rice water. The solution turned blue black in colour. This indicates rice water has -

• complex proteins

• simple proteins

• starch

• Fats

Which is the correct sequence -

• mouth → stomach → small intestine → oesophagus → large intestine

• mouth → oesophagus → stomach → large intestine → small intestine

• mouth → stomach → oesophagus → small intestine → large intestine

• mouth → oesophagus → stomach → small intestine → large intestine

The correct sequence of anaerobic respiration -

• Glucose → pyruvate → lactic acid

• glucose → pyruvate → carbon dioxide + ethanol

• glucose → pyruvate → ADP→ lactic acid

• glucose -→ pyruvate → carbon dioxide + ethanol + energy

The kidneys in human beings are part of ______.

• Nutrition

• Respiration

• Excretion

• Circulation

The part where the exchange of gases occurs during respiration is:

• Lungs and larynx

• Alveoli and throat

• Throat and lungs

• Alveoli and capillaries

The back flow of blood during the pumping of blood by heart is prevented by:

• Walls of ventricles

• Walls of atrium

• Valves in heart

• Walls between atria and ventricles

The extracellular fluid released from the capillaries is:

• serum

• plasma

• lymph

• mucus

Which of the following equations is the summary of photosynthesis?

• 6CO2 + 12H2O → C6H12O6 + 6O2 + 6H2O

• 6CO2 + H2O + Sunlight → C6H12O6 + O2 + 6H2O

• 6CO2 + 12H2O + Chlorophyll + Sunlight → C6H12O6 + 6O2 + 6H2O

• 6CO2 + 10H2O + Chlorophyll + Sunlight → C6H12O6 + 6CO2 + 6H2O