Plant Growth and Development Concepts

The video tutorial covers plant growth and development, starting from seeds to mature plants. It explains primary and secondary growth, highlighting the roles of meristem cells. The tutorial also discusses internal and external factors affecting plant growth, such as genetics, hormones, sunlight, and water. The session concludes with a review and questions to reinforce learning.

What is the initial stage of a plant's life cycle?

• Seed

• Root

• Flower

• Leaf

Which part of the seed protects the embryo from drying out?

• Cotyledon

• Seed coat

• Stem

• Root

What is the primary function of meristem cells in plants?

• Cell division

• Photosynthesis

• Water absorption

• Nutrient storage

During primary growth, which part of the plant grows first?

• Stem

• Flower

• Leaf

• Root

What is the role of secondary meristem in plants?

• Flowering

• Increase in width

• Increase in height

• Seed production

Which hormone is responsible for cell elongation in plants?

• Gibberellin

• Cytokinin

• Ethylene

• Auxin

Which of the following is not an external factor affecting plant growth?

• Soil

• Water

• Genetics

• Sunlight

What is the main source of nutrients for plants?

• Sunlight

• Air

• Soil

• Water

Which process is crucial for photosynthesis in plants?

• Respiration

• Transpiration

• Sunlight exposure

• Absorption

What is the primary difference between primary and secondary growth?

• Both increase height

• Both increase width

• Primary growth increases height, secondary growth increases width

• Primary growth increases width, secondary growth increases height