Science Test AT1

Question 1

Function of Stem

Answer 1

Transports water and nutrients from roots to leaves
Holds up flower

Question 2

Function of Roots

Answer 2

Absorbs water and nurients

Question 3

Function of leaves

Answer 3

To create photosynthasis for the plant
Creates, stores and transports glucose

Question 4

Function of flowers

Answer 4

To carry out reproduction

Question 5

Structure of stomata

Answer 5

Little pores surrounded by two guard cells

Question 6

Function of stomata

Answer 6

Tiny opening allowing water, carbon dioxide and oxygen to be exchanged from plant to atmosphere

Question 7

Function of chloroplast

Answer 7

Use energy from sun to make photosynthasis

Question 8

Requirements for photosynthasis

Answer 8

Water, carbon dioxide, sunlight, Glucose, oxygen

Question 9

Structure chloroplast

Answer 9

Contain green substance called chlorophyll

Question 10

Process of photosynthasis

Answer 10

Chlorophyll uses energy from sun to mix carbon dioxide and water together making glucose. Plants also release oxygen for us

Question 11

Structure of petals

Answer 11

Modified leafy structure, often bright coloured

Question 12

Structure sepal

Answer 12

-Outermost part of flower
-Small leaves directly under flower

Question 13

Function sepal

Answer 13

Protect flower bud during development

Question 14

Function of Petal

Answer 14

To attract insects for pollination

Question 15

Function of nectary

Answer 15

To produce nectar and attract pollinators

Question 16

Structure of nectaries

Answer 16

Often located at the base of petals

Question 17

Function of stamen

Answer 17

To produce pollen grains

Question 18

Function of Carpel

Answer 18

To help production of seeds

Question 19

Explain pollination

Answer 19

Transferring pollen grains from anther to stigma

Question 20

Define Fertilisation

Answer 20

The fusing of a male sex cell with a female sex cell

Question 21

What does a graph need?

Answer 21

-Title
-Axis with units
-variables on correct axis

Question 22

WHat are the variables on a graph

Answer 22

x=IV
y-DV
x is bottom
y is side

Question 23

Independent variable

Answer 23

What changes

Question 24

Dependent variable

Answer 24

What you measure

Question 25

Control variable

Answer 25

What you leave the same

Question 26

Disadvantages of sexual reproduction

Answer 26

-Two sex cells needed -Requires successful pollination which requires more time -Requires more energy

Question 27

Disadvantages asexual reproduction

Answer 27

No variation(if parent has genetic disease young also has)

Question 28

Advantages sexual reproduction

Answer 28

Variation allows at least a few to survive climate change, disease

Question 29

Advantages asexual reproduction

Answer 29

-Only one parent needed -Time efficient, don't need to wait for fertilization -Young plants are identical to parents so good genes passed on

Question 30

Fertilization process

Answer 30

Pollen lands on the stigma of a flower, pollen tube develops from pollen grain and grows down style into ovary. Male sex cell travels down pollen tube to ovule. Fertilisation occurs

Question 31

Types of asexual reproduction

Answer 31

runners cuttings tubers

Question 32

Cuttings

Answer 32

pieces of parent plant are removed and grown into new plants

Question 33

Tubers

Answer 33

roots like stem tubers can undergo vegetive reproduction

Question 34

Runners

Answer 34

grasses, strawberry and spider plants

Question 35

Define asexual reprodution

Answer 35

Produces offspring genetically identical to parent organism

Question 36

why is asexual reproduction less complex than sexual reproduction

Answer 36

Does not require flowers, pollinators or seed dispersal