Question

(a) A student investigates responses in seeds.
They place germinating seeds in a Petri dish.
The Petri dish is left on its side in a dark room.
After two days the student observes the direction of root growth.

Fig. 10.1 shows the investigation.

i) Complete the sentences to describe and explain the results in Fig. 10.1.
After 2 days the roots have grown downwards.
This is a tropic response called ………………………………………………… .
The roots are growing downwards towards ………………………………………………… to receive more water from the soil.
(ii) State two uses of water in a plant.
1 ……………………………………………………………………………………………………………………….
2 ……………………………………………………………………………………………………………………….
(iii) State the name of the plant cell that absorbs water from the soil.
…………………………………………………………………………………………………………………….
(iv) State the name of the vessels that transport water from the roots to the leaves in a plant.
…………………………………………………………………………………………………………………….

b) Mineral ions are also absorbed by plants.
Circle the main mineral ion required for the synthesis of chlorophyll.
calcium iron magnesium phosphate

(c) The boxes show some statements about plants.

Tick (√) three correct statement
Plants are producers in a food chain.                         
Plants can be selectively bred.                                     
Plants do not respire.                                                    
Plants form the main part of a carnivore’s diet.        
Plants manufacture carbohydrates.                            
Plants only reproduce asexually.