Plant nutrition and adaptations

This picture shows a group of different plants in Miss Sofi's garden. All of them make PS. Give a balanced equation for PS and explain why it needs to be balanced.

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What part of this lemon tree is underground? What is its function?

This picture shows a leaf from my lemon tree. Which layers make the structure of to this side of the leaf?

• Lower epidermis and stomata

• Palisade mesophyll and waxy cuticle

• Waxy cuticle and upper epidermis

• Spongy mesophyll and veins

If we observe the lower side of this leaf under a microscope... what structures would you expect to see? What is its main role?

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What is the main function of these adapted leaves, called thorns?

• Stop the wind

• Absorbe water

• Make photosynthesis

• Reduce evapotranspiration

Suggest a way in which this plant is adapted to the environment

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How is it possible that cacti make glucose if they only open their stomata at night, in the absence of light?

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If you were asked to water this plant... when should you do it?

• At 11 am

• At 7 am

• At 15 pm

• At 22 pm

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NGSS.MS-LS1-5

Imagine I decide to leave this flower pot here, on the grass. What would you expect to happen to the grass BELOW the flower pot after a couple of weeks? Explain your answer.

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Fertilisers are artificial products which make plants grow faster. Imagine you are asked to prove the effect of fertiliser on the growth of plants.

You decide to plant 22 tomato plants on plastic flower pots. You place them under artificial light and provide identical environmental conditions (water, CO2, nutrients in soil, temperature and pressure).

You measure the length of each plant, then you add the same amount of fertiliser to the 22 plants and you repeat the measurements after three weeks to analyse the change in size.

Suggest what is wrong in the design of this experiment.

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