Plants make their own food using photosynthesis. The food that plants produce is important, not only for the plants themselves, but for the other organisms that feed on the plants.
Which of the following are reactants in photosynthesis?
Glucose and oxygen
Carbon dioxide and water
Chlorophyll and light energy
Which of the following is required to produce amino acids from glucose?
Fatty acids and glycerol
Which of the following absorbs the energy required by photosynthesis?
Which of the following is a difference between plants adapted to sunny, and plants adapted to shady conditions?
The shade-adapted plants will have less chlorophyll
The compensation point is lower in shade adapted plants
Leaves in the shade always have a smaller surface area than plants growing in full sun
What is the compensation point?
The light intensity at which the rate of photosynthesis is equal to the respiration of a plant
The point at which the increased crop yields obtained by a plant grower offset the cost of the heaters installed in the greenhouse
The point at which enzyme activity is highest
Which of the following are true of the effects of temperature on photosynthesis?
The rate of photosynthesis is greatest at high temperatures
The optimum temperature for photosynthesis in all plants is 37°C.
At high temperatures lower than at where enzymes are denatured, respiration reduces yields from photosynthesis.
Which parts of the electromagetic spectrum are absorbed by the chlorophyll molecule?
Red and blue parts of the spectrum
Red and green parts of the spectrum
Blue and green parts of the spectrum
In an investigation on photosynthesis, why did a student add sodium hydrogencarbonate to the water?
To decrease the temperature of the water
To keep the pH of the water constant
As a source of carbon dioxide
Which of the following could best explain why a student studying bubbles of oxygen given off from pondweed obtained a result of 81 in one experiment, and 9 bubbles in a second experiment? - Higher
The student moved the pondweed from a distance of 10 cm away from the light source in the first experiment, to 90 cm away in the second
The student moved the pondweed from a distance of 10 cm away from the light source in the first experiment, to 30 cm away in the second
Because of systematic error in the student's results
Which of the following best explains why a plant breeder placed open bags containing a fungus around his greenhouse? - Higher
The fungi will respire and release carbon dioxide into the greenhouse.
The fungi will increase the oxygen concentration in the greenhouse
Fungi in the soil encourage root growth in plants.