Photosynthesis

Question 1

Why Plants are very important organisms in an ecosystem.

Answer 1

to maintain the balance in an ecosystem and drive most of important biological processes.

Question 2

Why are leaves Thin?

Answer 2

Leaves are thin because carbon dioxide can travel through them.

Question 3

Why are leaves wide?

Answer 3

Gets more sunshine

Question 4

What’s the basic anatomy of a cross section of a leaf

Answer 4

layer of cuticle covering a layer of epidermal cells.

Question 5

What are the basic parts of a leaf section consists of?

Answer 5

Upper epidermis, lower epidermis, palisade mesophyll layer, spongy mesophyll layer, air spaces, guard cell’s surrounding stoma pores on the lower surface.

Question 6

What’s the Function of the Upper epidermis?

Answer 6

Transparent to let light through protects inner layers.

Question 7

What’s the function of the lower epidermis

Answer 7

Contains stomata to allow gas exchange.

Question 8

What’s the function of the palisade mesophyll cells?

Answer 8

Primary site of photosynthesis.

Question 9

What’s the function of the spongy mesophyll cells?

Answer 9

Loosely arranged with air spaces to let co2 and o2 move into and out of cells.

Question 10

What’s the function of the stomata?

Answer 10

Pores which allow gas exchange and water loss.

Question 11

What’s the function of the guard cells?

Answer 11

Change their shape to open and close stomata

Question 12

What is the name of the top layer of the plant?

Answer 12

Wax and cuticle covering.

Question 13

What is the process of photosynthesis

Answer 13

The process which green plants make their own food

Question 14

How do green plants get their food?

Answer 14

Light energy into chemical energy in food

Question 15

What do plants need to photosynthesise?

Answer 15

Carbon dioxide and water.

Question 16

Where does water take in by the plant?

Answer 16

The roots.

Question 17

Where does water move upwards through the plant?

Answer 17

Through the roots and stems to the leaves.

Question 18

How do plants produce oxygen?

Answer 18

As a by-product of photosynthesis.

Question 19

Where is oxygen released into?

Answer 19

The atmosphere.

Question 20

What is needed to trap light energy for photosynthesis?

Answer 20

Chlorophyll (green pigment)

Question 21

Where are chlorophyll found in?

Answer 21

Chloroplasts (in green plant cells)

Question 22

What do plants produce during photosynthesis?

Answer 22

Sugar (glucose)

Question 23

How do plants store glucose in photosynthesis?

Answer 23

Can be stored as starch.

Question 24

What do plants also use glucose for?

Answer 24

Cellulose

Question 25

What is the word equation for photosynthesis?

Answer 25

Water + carbon dioxide = glucose + oxygen.

Question 26

What do herbivores eat?

Answer 26

They eat only plants.

Question 27

What do carnivores eat?

Answer 27

They only eat animals.

Question 28

What do omnivores eat?

Answer 28

They eat both plants and animals. E.x. Dogs, cats, sheep’s and plants.

Question 29

What is meant by a food chain?

Answer 29

Group of organisms linked in order of the food they eat. E.g. from producers to consumers, and from prey, predators, scavengers, and decomposers.

Question 30

What do food chains indicate The (direction) of?

Answer 30

The arrows pointing to the direction of energy flow. i.e. the arrow always points from the eaten to the eater.

Question 31

What do consumers eat?

Answer 31

Eat plants and other animals.

Question 32

What is called when predators eat other animals

Answer 32

Prey.