Transpiration and Translocation in Plants

The video provides a detailed overview of plant transport mechanisms, focusing on transpiration and translocation. It explains how water moves through the xylem and how sucrose and amino acids are transported via the phloem. The video also covers factors affecting transpiration, such as temperature, wind speed, and humidity, and describes how to measure transpiration using a potometer. Additionally, it discusses wilting and the role of water in plant support.

What is the primary function of transpiration in plants?

• To produce energy through photosynthesis

• To store water in the leaves

• To facilitate the movement of water from roots to leaves

• To absorb nutrients from the soil

Which of the following is NOT a factor affecting the rate of transpiration?

• Wind speed

• Humidity

• Temperature

• Soil type

How does increased wind speed affect transpiration?

• It causes the plant to wilt

• It increases the rate of transpiration

• It has no effect on transpiration

• It decreases the rate of transpiration

What is the purpose of using a potometer in plant experiments?

• To measure the rate of photosynthesis

• To measure the nutrient uptake in plants

• To measure the growth rate of plants

• To measure the rate of transpiration

What happens to a plant when it wilts?

• The plant's roots grow faster

• The plant becomes soft and droops

• The plant's leaves turn yellow

• The plant becomes more rigid

What causes wilting in plants?

• Excessive nutrient absorption

• Lack of carbon dioxide

• More water loss than water uptake

• Too much sunlight

What is translocation in plants?

• The movement of water through xylem

• The absorption of minerals from the soil

• The movement of sucrose and amino acids through phloem

• The process of photosynthesis

In the context of translocation, what is a 'source' in plants?

• A part of the plant that stores water

• A part of the plant that releases sucrose or amino acids

• A part of the plant that stores minerals

• A part of the plant that absorbs sunlight

During which season do roots act as a source in plants?

• Summer

• Winter

• Spring

• Autumn

What role do phloem tubes play in plants?

• They transport sucrose and amino acids

• They provide structural support

• They store nutrients

• They transport water from roots to leaves