Plant Growth and Photosynthesis Concepts

The video tutorial covers a biology experiment involving corn seed germination, focusing on the effects of temperature and moisture. It explains plant responses to light (tropism) and the process of photosynthesis. The tutorial also includes a starch test for plants and discusses glycogen storage in animals.

What is the primary aim of the experiment involving corn seeds in test tubes A and B?

• To compare the size of corn seeds in different conditions

• To determine the effect of light on seed germination

• To observe the growth rate of corn seeds

• To determine the effect of temperature on seed germination

Why is germination more likely to occur in test tube A than in test tube B?

• Test tube B has less water

• Test tube A has more seeds

• Test tube A is exposed to more light

• Enzymes are more active at 20°C

What role does moisture play in the germination process?

• It prevents the seed from absorbing nutrients

• It increases the temperature of the seed

• It provides light for photosynthesis

• It softens the seed coat and activates enzymes

What type of movement is shown by plants when they grow towards light?

• Geotropism

• Hydrotropism

• Phototropism

• Thigmotropism

How can students make seedlings grow straight upwards?

• Expose the seedlings to wind

• Water the seedlings more frequently

• Place the light source directly above the seedlings

• Cover the seedlings with a transparent sheet

What is the primary process by which plants produce their own food?

• Photosynthesis

• Respiration

• Transpiration

• Fermentation

Which raw materials are required for photosynthesis?

• Chlorophyll and oxygen

• Carbon dioxide and water

• Nitrogen and sunlight

• Oxygen and glucose

What is the purpose of the starch test in plant leaves?

• To determine the presence of chlorophyll

• To measure the growth rate of leaves

• To assess the water content in leaves

• To check for the presence of starch

Which plant organ, other than leaves, commonly stores starch?

• Roots

• Petals

• Bark

• Flowers

In animals, which organs are known for storing glycogen?

• Brain and spinal cord

• Heart and lungs

• Liver and muscles

• Kidneys and stomach