Biology - Plant and Ecosystems

Question 1

How does photosynthesis make food?

Answer 1

Using chemical reactions from the use of sunlight

Question 2

What are the 4 things needed for photosynthesis?

Answer 2

Sunlight, chlorophyll, carbon dioxide, water

Question 3

What is the equation for photosynthesis?

Answer 3

Carbon dioxide + water —> Glucose and Oxygen

Question 4

How are leaves adapted for efficient photosynthesis?

Answer 4

Broad leaves with a big surface area to absorb light
Chloroplasts on the top of the leaf
Stomata for the exchange of gases

Question 5

How do plants absorb minerals and water from the soil?

Answer 5

Through their roots

Question 6

In a flower, what is the stamen? What does it consist of?

Answer 6

The male parts of the flower, consisting of the anther and the filament. The anther contains the pollen grains the male sex cells.

Question 7

In a flower, what is the carpel? What does it consist of?

Answer 7

The female part of the flower, consisting of the stigma, style and ovary

Question 8

What is pollination?

Answer 8

The prices of getting the pollen from the stamen to the stigma of the carpels

Question 9

Describe the two forms of pollination?

Answer 9

Self-pollination: pollen is transferred from stamen to stigma on the same plant
Cross-pollination: pollen is transferred from the stamen of one plant to the stigma of a different plant

Question 10

What features of a plant encourage insect pollination?

Answer 10

Bright coloured petals, scented flowers and sticky stigma.

Question 11

Describe what happens after a flower is pollinated

Answer 11

A pollen tube grows out of the pollen grain down though the style to the ovary. The nucleus from the male sex cell joins the female sex cell inside the ole for fertilisation to occur. The ovule then develops into a seed. The ovary develops into a fruit around the seed

Question 12

In what different ways can seeds be dispersed (spread out)? Why is dispersal important?

Answer 12

Wind dispersal, animal dispersal, explosions from the plant, drop and roll
Dispersed seeds are important to that plants can grow without too much competition

Question 13

What is an ecosystem?

Answer 13

All of the living organisms in one area

Question 14

Why are almost all living things dependent on plants?

Answer 14

Plants capture the suns energy. Almost all energy on earth comes from the sun. Plants can use this energy to make food and then animals can eat the plants

Question 15

How do plants ensure there is plenty of oxygen in the atmosphere?

Answer 15

Plants release oxygen during photosynthesis

Question 16

What does a food chain show?

Answer 16

Which animal eats another animal. The arrow show what is eaten by what.

Question 17

What does the direction of the arrow in food chain diagrams represent?

Answer 17

The direction of energy flow.

Question 18

What is a consumer?

Answer 18

All animals are consumers as they consume plants or each other

Question 19

What is a produce?

Answer 19

All plants are producers as they produce food energy using the sun.

Question 20

What is the top carnivore?

Answer 20

The animal that is not eaten by anything else