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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