Nutrition & Growth 6B1

Question 1

What are the 4 parts of a plant?

Answer 1

Roots, Stem, Leaves, Flowers

Question 2

What do roots do (2 things, incl detail)?

Answer 2

1. ANCHOR the plant to the ground

2. ABSORB water and minerals through the ROOT HAIR CELLS.

Question 3

Why are Root Hair Cells designed like they are (2)?

Answer 3

Larger/huge SURFACE AREA, so faster/better ABSORPTION.

Question 4

What does the STEM do (2, with detail)?

Answer 4

1. TRANSPORTS water and nutrients up and around the plant.
2. HOLDS UP the leaves and flowers, so they are higher, and more likely to get sunlight for photosynthesis, or to successfully pollinate by Seed Dispersal.

Question 5

What do the Leaves do (2, with detail)?

Answer 5

1. Make sugars by PHOTOSYNTHESIS

2. for TRANSPIRATION (water evaporates through stomata, which draws up more water).

Question 6

Photosyntheisis - chemical reaction?

Answer 6

6(CO2) + 6(H2O) (with sunlight hitting chloroplasts) = C6H1206 + 6(O2)
(numbers are subscript)

Question 7

What do plants need to make sugars (3)?

Answer 7

light, water, air

Question 8

What is it called when plants or animals burn sugars in oxygen to release energy?

Answer 8

Respiration.

Question 9

When do plants Respire?

Answer 9

All the time.

Question 10

When do they Photosynthesise (make sugar)?

Answer 10

During daylight.

Question 11

What will happen to plants in the absence of light (4)?

Answer 11

• plants will grow FASTER
• but will be YELLOW and SPINDLY
• eventually they will DIE
• as they cannot make SUGAR which gives them the ENERGY they need to grow/survive.

Question 12

What else do plants need to survive?

Answer 12

Minerals

Question 13

What main types of minerals do plants need?

Answer 13

Phosphates and Nitrates

Question 14

What if plants have not enough phosphates?

Answer 14

Poor roots, and Purple new leaves

Question 15

What if plants don’t have enough nitrates?

Answer 15

Yellow leaves and stunted growth