9B3 Sexual Reproduction in Flowering Plants

What is meant by "seed dispersal"?

• the development of seed into a new plant

• the spread of seed away from the parent plant

• the development of ovule into a seed after fertilization

• the spread of seed to the stigma of another flower

An experiment is set-up to investigate the factors required for seed germination.

Predict which seeds will germinate after one week.

• A

• B

• C

• D

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What is the correct description of pollination?

• Pollen grains are transferred from anther to the ovary

• Pollen grains are transferred from the anther to the stigma

• Pollen grains are transferred from the ovary to the stigma

• Pollen grains are transferred from the stamen to the anther

Insect-pollinated flowers typically have

• Small, inconspicuous flowers

• No scent

• Light, powdery pollen grains

• Relatively large, and often sticky grains of pollen

Tags

NGSS.MS-LS1-4

The table shows the condition that four samples of seeds were kept in. Which sample would germinate?

• A

• B

• C

• D

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

The diagram shows a section of a flower that has been cross pollinated.

Which statements about this flower are correct?

1. The pollen produced by this flower will be genetically different from the pollen on the stigma

2. The pollen was carried to the stigma by wind

3. This flower is insect- pollinated because the stigma is enclosed by the petals.

4. The pollen was produced by another flower on the same plant

• 1,2, and 4

• 1 and 3

• 3 only

• 2 and 4 only

Tags

NGSS.MS-LS1-4

The process of the nucleus of the pollen fusing with the nucleus of the ovule is called ________________.

• Pollination

• Fertilisation

• Germination

• reproduction

Which part of the flower is usually feathery or sticky?

• petals

• stigma

• anther

• nectar

Tags

NGSS.MS-LS1-4

Why are shorea seeds able to be dispersed by the wind?

• It is light and has wing-like structure

• It has hooks to hook onto the fur of animals

• It has a fibrous husk that makes it float

• It has dry pods that split open

All the following are the seed dispersal methods, except.......

• By wind

• By warmth

• By animals

• By explosive mechanism