Topic 4 - Lesson 6

Question 1

Stages of germination

Answer 1

1. In the right conditions germination can occur and the seeds absorb water from the soil
2. The water activates enzymes which begins to hydrolyze starch into glucose and sucrose into glucose and fructose
3. Proteases and lipases convert proteins and fats into amino acids, fatty acids and glycerol
4. The seed can use the carbohydrates, proteins and fats for growing

Question 2

Seed dispersal

Answer 2

Seeds can disperse themselves via wind, water and gravity

Question 3

Monocotyledon

Answer 3

A monocotyledon is a long narrow leaf with parallel veins with vascular bundles scattered

Question 4

Dicotyledon

Answer 4

A dicotyledon has two cotyledons with broad veins with vascular bundles in a ring

Question 5

Testa

Answer 5

The protective outer covering of a seed; the seed coat.

Question 6

Cotyledon

Answer 6

An embryonic leaf in seed-bearing plants, one or more of which are the first leaves to appear from a germinating seed.

Question 7

Plumule

Answer 7

The rudimentary shoot or stem of an embryo plant

Question 8

Radicle

Answer 8

The radicle is the first part of a seedling to emerge from the seed during the process of germination

Question 9

How is starch foam produced

Answer 9

It is produced at high temperature and pressure which makes the starch form a plastic mass and when the pressure is released the steam storms and it puffs which allows it to be used as packaging, cereal and snacks

Question 10

Uses of plant fibres

Answer 10

We can use plant fibres by dissecting the plant and removing the cellulose and lignin they are suitable due to their length, ease, durability and resistance to wear. They are an example of a bio composite which are renewable, biodegradable. meaning they are better for the environment

Question 11

Issues with biocomposites

Answer 11

Whilst they are more ecofriendly they are sometimes less efficient and if there is no oxygen getting to the products in landfill then they will not be able to decompose and therefore will take up the same amount of room as a plastic product