Photosynthesis (Energy)

Which of the following is a source of energy for plants?

• sun

• water

• oxygen

• carbon dioxide

Plants take in water from their roots.

Where is the water transported to?

A: flowers

B: fruits

C: leaves

D: stems

• C only

• A and B only

• B, C and D only

• A, B, C and D

Some water containing red dye was poured into the soil of a potted plant. After a few hours, some parts of the flowers and leaves turned red.

Which of the following statements are correct for the potted plant?

A: Water is taken in by the roots.

B: Water is transported to the leaves.

C: Water is transported to the flowers.

D: Water is carried through the stem.

• A and D only

• B and C only

• A, B and C only

• A, B, C and D

The diagram shows a green plant.

How does X obtain its food?

• The food is made by X itself.

• The food is transported from Y.

• The food is absorbed from the soil.

• The food is transported from the leaves.

An outer ring of a stem was removed from a plant, as shown below. As a result, the tubes carrying food and water were removed.

It was observed that Z grew bigger after one week. Which one of the following statements best explains the observation?

• Food is made by Z itself.

• Food is transported from X to Z.

• Food is transported from Y to Z.

• Food is absorbed by Z from the soil.

The diagram below shows three glass tanks, P, Q and R, each containing different organisms and with the same amount of carbon dioxide in each.

The three glass tanks were sealed and kept in a well-lit room for six hours.

In which of the tanks would there be an increase in carbon dioxide after six hours?

• Q only

• R only

• P and Q only

• P and R only

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-3

NGSS.HS-LS2-5

An outer ring of the stem between positions X ands Y of a plant is removed. The tubes which carry food between positions X and Y are removed while the tubes carrying water remain in the stem.

After some time, which one of the following diagrams represents the appearance of the stem?

• 
• 
• 
• 

Rita set up an experiment in a dark room as shown.

She placed a table lamp at a distance of 20 cm from the glass jar. After one hour, she observed that the syringe had collected 5 cm³ of gas. She repeated the experiment by placing the lamp at different distances from the glass jar.

Which one of the following shows the most likely result of this experiment?

• 10 cm from lamp - less than 5cm³ of gas collected

• 10 cm from lamp - 5cm³ of gas collected

• 30 cm from lamp - less than 5cm³ of gas collected

• 30 cm from lamp - more than 5cm³ of gas collected

When do photosynthesis and respiration normally occur in green plants?

• Photosynthesis - day

  Respiration - night

• Photosynthesis - day and night

  Respiration - night

• Photosynthesis - day

  Respiration - day and night

• Photosynthesis - day and night

  Respiration - day and night

Dinah wanted to find out whether water plants affect the amount of carbon dioxide in water at different times of the day. She used the set-up as shown.

She placed the set-up near the window and added a few drops of liquid X to the water. Liquid X changes colour as shown in the table.

What colour would the water with liquid X be at midday and midnight?

• At midday - red

  At midnight - yellow

• At midday - purple

  At midnight - yellow

• At midday - yellow

  At midnight - purple

• At midday - purple

  At midnight - red