Secondary Growth in Plants

The video explains secondary growth in plants, focusing on how thin plants transform into thick trees. It covers the role of various plant layers, such as the epidermis, hypodermis, and vascular bundles, in this process. The video also discusses the role of cambium in forming secondary xylem and phloem, and how seasonal changes create growth rings. The formation of new layers like cork and secondary cortex is explained, along with their functions. The video concludes with a summary and invites viewers to ask questions.

What is the primary focus of secondary growth in plants?

• Producing seeds

• Transforming a thin plant into a thick tree

• Developing flowers and fruits

• Increasing the height of the plant

Which layer is responsible for photosynthesis and support in plants?

• Epidermis

• Cortex

• Hypodermis

• Pith

What is the function of the vascular cambium during secondary growth?

• Forms new leaves

• Produces secondary xylem and phloem

• Creates flowers

• Develops roots

Which cambium is responsible for forming the protective layers in plants?

• Vascular cambium

• Cork cambium

• Medullary cambium

• Interfascicular cambium

During which season is the activity of vascular cambium the highest?

• Summer

• Spring

• Autumn

• Winter

What is the significance of annual rings in trees?

• They display the number of leaves

• They indicate the height of the tree

• They represent the number of branches

• They show the age of the tree

What layer replaces the ruptured epidermis during secondary growth?

• Cork

• Primary phloem

• Secondary cortex

• Medullary rays

What happens to the primary cortex during secondary growth?

• It forms new leaves

• It gets crushed between new layers

• It remains unchanged

• It becomes thicker

Which part of the plant is primarily involved in the transport of water and minerals?

• Secondary phloem

• Cortex

• Primary xylem

• Secondary xylem

What is the role of the cork cambium in secondary growth?

• Forms new roots

• Develops flowers

• Produces secondary xylem

• Creates a protective cork layer