Plants and photosynthesis：練習問題

What is the correct word equation for the process of photosynthesis?

Which statement correctly describes the movement of substances during transpiration and translocation?

Which of the following would be the most effective method for controlling the spread of Rose black spot in a garden?

In which part of the plant cell does photosynthesis primarily take place?

Plant cells often use nitrate ions absorbed from the soil. Which of the following is a primary use for these nitrate ions in plants?

In which cellular structure does photosynthesis take place?

Identify the waste product of photosynthesis that is required for cellular respiration in animals.

Discuss how a shortage of nitrate ions in the soil would affect a plant's ability to synthesize proteins from the products of photosynthesis.

A student investigated the effect of light intensity on the rate of photosynthesis in pondweed. They placed a 10 cm piece of pondweed in a beaker of water and positioned a lamp at various distances from it. The number of bubbles produced per minute was recorded.

a) Explain why the rate of photosynthesis is often measured by counting the number of bubbles released by an aquatic plant like pondweed. (2 points)
b) The student found that at a distance of 10 cm, the plant produced 40 bubbles per minute. When the lamp was moved to 20 cm, the rate decreased significantly. Use the inverse square law to explain how light intensity changes when the distance from a light source is doubled. (2 points)
c) Apart from light intensity, name two other environmental factors that can limit the rate of photosynthesis if they are in short supply. (1 point)

Photosynthesis and translocation are vital processes for plant growth and survival. Sugars produced in the leaves must be transported to other parts of the plant for immediate use or storage.

a) Write the balanced symbol equation for photosynthesis. (2 points)
b) Describe the process of translocation. In your answer, include the name of the tissue involved and its structural adaptations for this function. (3 points)
c) Plants also require mineral ions for healthy growth. Explain how root hair cells are adapted to take up mineral ions from the soil against a concentration gradient. Name the process involved. (3 points)