Plant Structure and Function

Front

What is the role of auxins in plants?

Back

Auxins are plant hormones that promote cell elongation and are found in rapidly growing tissues, influencing growth patterns and responses to light and gravity.

Front

Define stomata.

Back

Stomata are small openings on the surface of leaves that allow gases (such as carbon dioxide and oxygen) to pass in and out of the plant.

Front

What is the function of gibberellins in plants?

Back

Gibberellins are hormones that promote stem elongation, seed germination, and flowering. Dwarf plants often lack gibberellins.

Front

How does ethylene affect fruit ripening?

Back

Ethylene is a gaseous plant hormone that triggers the ripening process in fruits, leading to changes in color, texture, and flavor.

Front

What is the significance of cytokines in plant growth?

Back

Cytokinins are hormones that promote cell division and growth, particularly in roots and shoots, and play a role in delaying leaf senescence.

Front

Explain the term 'phototropism'.

Back

Phototropism is the growth response of a plant to light, where plants grow towards the light source, primarily influenced by auxins.

Front

What is the difference between primary and secondary growth in plants?

Back

Primary growth increases the length of the plant (roots and shoots), while secondary growth increases the thickness (girth) of stems and roots.

Front

Describe the function of xylem in plants.

Back

Xylem is a type of vascular tissue responsible for the transport of water and minerals from the roots to the rest of the plant.

Front

What role does phloem play in plant structure?

Back

Phloem is the vascular tissue that transports sugars and nutrients produced by photosynthesis from the leaves to other parts of the plant.

Front

Define transpiration in plants.

Back

Transpiration is the process by which water vapor is released from the plant's leaves into the atmosphere, helping to regulate temperature and nutrient transport.