Biology4 8B Sexual reproduction in plants Flashcards Preview

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Flashcards in Biology4 8B Sexual reproduction in plants Deck (47)
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1

When sex cells (or gametes) fuse what do they produce?

The gametes fuse to produce a fertilised egg cell or zygote.

2

Where does photosynthesis happen in a leaf cell

Photosynthesis happens in a chloroplast in a leaf cell?

3

What are the 2 parts of the stamen?

The 2 parts of the stamen are the anther and the filament.

4

What are the last two levels of classification of any organism?

The genus and species

5

Why do plants have brightly coloured flowers?

Brightly coloured flowers attract insects to pollinate the flowers.

6

What is the difference between the offspring from sexual and asexual reproduction?

The offspring from sexual reproduction contain characteristics from both parents whilst those from asexual reproduction have identical DNA and so look just like their parents.

7

How do insect and wind pollinated flowers look different?

Insect pollinated flowers have large, brightly coloured petals to attract insects. Wind pollinated flowers have small petals, often brown or dull green because there is no need to attract insects

8

Name the 3 stages of the life cycle after the egg cell is released.

The egg cell is fertilised creating 1) a zygote which grows into 2) an embryo, which can grow into 3) an adult and become a parent so completing its life cycle.

9

Why don't you look the same as your brothers or sisters if you have the same parents?

The differences in the way you and your siblings look (your characteristics) is called inherited variation. It is due to the mixing up of genes every time eggs and sperm are made.

10

What are the 4 parts of the carpel?

The 4 parts of the carpel are the stigma, style, ovary and ovule.

11

What do we call the sex cells (or gametes) in animals?

The sex cells (or gametes) in animals are called sperm and eggs

12

How can we increase the repeatability of a sample?

The more samples we take the more repeatable the estimate is likely to be but the longer it will take to do.

13

How do plants such as strawberries or potatoes reproduce asexually?

Some plants can reproduce using asexual reproduction by using runners in strawberries or tubers in potatoes.

14

What is the name of the process where plants capture light energy and use it to make sugars?

This process is called photosynthesis.

15

How does the pollen of insect and wind pollinated flowers look different?

Insect pollen is often sticky or spiky to stick to insects. The pollen of wind pollinated flowers is very light and smooth so it can be blown in the wind.

16

What is a carpel?

The carpel is the name of the female reproductive system in a plant.

17

What 3 features help you decide that this organism is a plant?

The plant kingdom contains organisms that have 1) green leaves, 2) cell walls made of cellulose and 3) can photosynthesise

18

What R is the process that produces young/offspring?

Reproduction produces new living things (offspring).

19

Where are pollen grains made?

The pollen grains are made in the anther of a flower.

20

Do insect and wind pollinated flowers both contain nectar?

Insect pollinated flowers usually contain nectar to attract insects. Wind pollinated flowers don't have nectar because there is no need to attract insects

21

How does the stigmas of insect and wind pollinated flowers look different?

In the insect pollinated flower the stigma has sticky coating so pollen sticks to it. The wind pollinated flower has feathery or net like stigmas to catch the drifting pollen

22

Why do plants spend energy on making sugary fruit?

Fruit are used for seed dispersal, which stops the new plants competing with the parent plants for water, nutrients, light and space.

23

What 5 things does a growing plant need?

A growing plant needs light, air, water, warmth and nutrients called mineral salts (LAWWN).

24

What is the difference between the number of parents needed in sexual and asexual reproduction?

Sexual reproduction needs two parents to produce sex cells or gametes. In asexual reproduction only one parent is involved.

25

What do we call the sex cells (or gametes) in plants?

The sex cells (or gametes) in plants are called pollen and eggs.

26

How can you estimate the plant populations in an area?

Plant populations in an area can be estimated by taking samples using a quadrat.

27

Why does each species have a two-word scientific name?

Each species has a two-word scientific name which allows scientists all over the world to be sure they are talking about the same organism.

28

What is inside a seed?

The seed contains the embryo and a food store to help it grow when the conditions are right..

29

Name the 4 stages of fertilisation starting with a pollen grin landing on the stigma.

Once on the stigma, 1) a pollen grain grows a pollen tube, 2) which enters the ovule containing an egg cell. 3) The nucleus from the pollen grain joins with the nucleus inside the egg cell to 4) form a zygote or embryo. This is called fertilisation.

30

Which part of a flower are eggs made in?

The egg of a plant is made in the ovule which is in the ovary in the base of a flower.