Photosynthesis

Question 1

A simple illustration representing the basic feeding relationships between organisms in a habitat

Answer 1

Food chain

Question 2

When are food webs used?

Answer 2

Food webs are to represent a more complex food relationship: where most organisms eat more than one animal.

Question 3

A food chain diagram that includes the number of organisms

Answer 3

Pyramids of a number

Question 4

True or false in a food chain only some of the energy is passed onto the consumer

Answer 4

True

Question 5

What are identification keys used for?

Answer 5

Identification keys are used to recognise living organisms by their key characteristics

Question 6

What are the 5 main types of bug sampling?

Answer 6

Using pooters- used to catch small insects
Pitfall traps-traps designed to capture small insects
Sweep nets- designed to catch flying insects
Kick sampling- nets that disturb the bank of flowing water to catch bugs
Tree beating- used to shake the tree to catch bugs clung to it

Question 7

What is photosynthesis?

Answer 7

A chemical reaction which occurs in the chloroplasts of a plant which allows a plant to create its own food.

Question 8

What is the chemical formula for photosynthesis?

Answer 8

CO2+Water➡️Oxygen+Glucose

Question 9

What factors affect photosynthesis?

Answer 9

Light levels, Watering,Temp,CO2 levels.

Question 10

What is a test for chlorophyll

Answer 10

You add a leaf to a test tube filled with ethanol
You then boil the test tube until you see it bubble then you remove the leaf and the ethanol should be green.

Question 11

What is the test for starch (glucose)

Answer 11

Iodine

Question 12

How do you know if a leaf has starch with iodine

Answer 12

It turns black or blue

Question 13

How do you know if a leaf has chlorophyll

Answer 13

The ethanol turns green

Question 14

Photosynthesis is a process which works in the oposite way to ___

Answer 14

Aerobic respiration

Question 15

What does a plant need in order to photosynthesise instead of respire?

Answer 15

Light, so it needs to take place in the day.

Question 16

True or false a plant will also choose to respire instead of phontosynthesise during day or night

Answer 16

True

Question 17

Explain the function of the Cuticle

Answer 17

The cuticle is a thin waxy layer which covers the leaves, stem and other parts of the plant. It acts as a barrior which prevents water from evaporating out of the plant

Question 18

What is the paliside mesophyll for in a plant?

Answer 18

Palisade cells are leaf cells that are packed with chloroplasts and they sit right under the surface of a leaf, in order for the chlorophyll inside the chloroplasts to absorb as much sunlight as possible in order to photosynthesise.

Question 19

What part of a plant cell does photosynthesis occur in and why?

Answer 19

Photosynthesis occurs in the chloroplasts of a cell as these are packed with chlorophyll which absorbs light to help photosynthesis

Question 20

What is the function of the spongy mesophyll in a leaf of a plant?

Answer 20

it helps the plant exchange gases ( oxygen gets kiced out and c02 comes in) It does this by acting like a sponge to make it easier for gases to move around

Question 21

What is the function of the stoma?

Answer 21

The stoma or stomata for plural are located at the bottom of the leaf in the lower epidermis, they open and close to let co2 in and oxygen out in the process of gas exchange.

Question 22

are the stomata present in the top or bottom of the leaf?

Answer 22

bottom

Question 23

Where are the stomata located?

Answer 23

In the lower epidermis of a leaf
(so at the bottom of the leaf)

Question 24

Where is the upper epidermis located in a leaf?

Answer 24

In the top of the leaf just under the cuticle

Question 25

What is the upper epidermis for?

Answer 25

To protect the leaf but let sunlight through to the palisades for photosynthesis as they are transparent.

Question 26

what are ribosomes used for in a plant cell?

Answer 26

making proteins

Question 27

where does respiration occur in a plant cell?

Answer 27

mitochondria

Question 28

what are the mitochondria used for in a plant cell?

Answer 28

respiration

Question 29

What is the cell wall used for in a plant cell?

Answer 29

to keep the sturdy stucture of the plant cell.

Question 30

What is the Vacuole used for in a plant cell?

Answer 30

It maintains water balance as well as storing nutrients and waste products for the plant.

Question 31

What is the Nucleus used for in a plant cell?

Answer 31

Store of the DNA

Question 32

What is the cytoplasm used for in a plant cell?

Answer 32

Supports chemical reactions, holds organells in the cell in place.

Question 33

Which enzyme breaks down starch (which you get from food) into glucose which the body processes into energy?

Answer 33

Amylayse

Question 34

Name the 3 conditions that plants need in order to photosynthesis

Answer 34

Sunlight, Carbon dioxide and Water

Question 35

Your body gets starch from food. What is the starch then broken down into?

Answer 35

Glucose (type of sugar)

Question 36

Which enzyme breaks starch down into glucose?

Answer 36

Amylase

Question 37

Name the three main types of enzymes involved in the digestive process

Answer 37

Amylase- breaks down starch into glucose sugars Protease- breaks down proteins into amino acids ( Lipase-breaks fats into fatty acids

Question 38

What is an indicator species of clean water?

Answer 38

Fresh water shrimp

Question 39

What is an indicator species of polluted water?

Answer 39

Sludge worm

Question 40

What is an indicator species of air pollution?

Answer 40

Lichen

Question 41

Define indicator species

Answer 41

An organism which can be used to infer conditions in a particular habitat.

Question 42

What is bioaccumulation?

Answer 42

It is the build up of toxic substances that cannot be excreted within a food chain.

Question 43

What animals are most affected by bioaccumulation?

Answer 43

Animals at the top of the food chain

Question 44

Name two common toxic metals that mammals cannot excrete

Answer 44

Lead, mercury

Question 45

What are the risks of mercury?

Answer 45

Damage to the nervous system and reproductive system