Download HELP

Homework
Plant groups
D1
HELP
1 a The boxes below show the names of two types of
plants and descriptions of two other types.
Have thin, needlelike leaves with
veins.
Mosses
Leaves have a cuticle
and veins. Can grow
in all habitats.
Ferns
Copy the table below. Write in the information from
the boxes into the correct places in the table.
Type of plant
Description
Conifers
Have large, tough leaves called
fronds on strong stems.
Flowering plants
Have very small, simple leaves
with no cuticles and no veins.
b Which plant must live in
a damp habitat?
A
no vein
or cuticle
c Which plant can survive
a very cold climate?
d Copy and complete the
following sentence:
Flowering plants can
grow in almost any
habitat because …
waxy B
cuticle
vein
2 cm
1 cm
C
vein
D
cuticle
cuticle and
vein
5 cm
CORE
2 a Look at the diagrams. Then
use the key to identify each
type of plant.
b Suggest why ferns can
grow well in shaded
woodland.
30 cm
Has a cuticle
and veins
YES NO
Has very thin
spiky leaves
It is a
MOSS
YES NO
It is a
CONIFER
Has very thin leaves
either side of the main
vein
YES NO
It is a
FERN
© Harcourt Education Ltd 2004 Catalyst 2
This worksheet may have been altered from the original on the CD-ROM.
It is a
FLOWERING
PLANT
Sheet 1 of 2
D1
Plant groups (continued)
Homework
EXTENSION
3 The description below is of a plant called hemlock water dropwort.
Hemlock water dropwort
This is a substantial, very poisonous plant that smells strongly of parsley
and is a member of the carrot family. It grows up to 2.5 metres tall, in
clumps, near ponds, ditches and other sources of fresh water.
Its stems are hollow for over half their height and both the stems and the
leaves have many very obvious veins. Its leaves are frond-like and are
held away from the main stem on strong, veined stalks.
It forms large seeding heads, up to 100 cm across, from July through to
August. Its seeds are contained in a fruit that is covered in spikes.
a What information tells you that this is a vascular plant?
b Suggest a reason why the plant needs very well-defined veins.
c Most members of the carrot family are much shorter than hemlock
water dropwort. Suggest a reason why this plant needs to grow
close to ponds or streams.
d What is the advantage, to the plant, of being very poisonous?
e What information suggests that the hemlock water dropwort is a
flowering plant?
f
How might the spikes on the plant’s seeds be helpful?
4 Mushrooms and toadstools belong to a special group called fungi.
They are saprophytes, which means that they get their nutrients
directly from dead and decaying plant material in the soil. They do not
have leaves. They do not have flowers, as they reproduce through
spores.
Broomrapes are another type of plant that has no leaves but they do
produce flowers and seeds. These are parasitic plants that obtain all
the nutrients they require from the root systems of other plants, upon
which they grow. For example, the common broomrape has roots that
penetrate the root system of clover and daisy plants and draws up food
from them.
a Why do saprophytes and parasitic broomrapes not need green
leaves?
b Oxtongue broomrape is only found in a few sites around the chalk
cliffs of southern England. Oxtongue is a yellow-flowered plant that
also grows only in southern England.
Suggest a reason why the oxtongue broomrape is classified as a
very rare plant in the UK.
© Harcourt Education Ltd 2004 Catalyst 2
This worksheet may have been altered from the original on the CD-ROM.
Sheet 2 of 2