Language focus

1. Find the synonyms to the following words in the text:

to take place to attach decay to get often

help to develop in a bun to join

separately at times inner outer.

2. Memorize the following antonyms:

frequently - infrequently favourable - unfavourable

properly - improperly active – inactive

internal – external inner – outer.

3. Form the derivatives of the words given in the table (where possible):

Noun	Verb	Adjective
trail
	to decompose
decay
versatility
		respiratory
	to occur
contraction
reproduction
conjugation
		variable
evolution
	to transmit
desiccation

4. Define the following terms:

monera	prokaryote	conjugation	decomposer	enzyme
transformation	cyanobacteria	eukaryote	transduction	spore
critical to life	dormant stage	mutation	a protein bridge

5. Match the first half of a sentence in column A with the appropriate second half in column B:

A	B
1. Geochemical recycling of the earth’s nitrogen, carbon, and sulfur	a) occur as single-celled organisms.
2. Most monerans	b) would not decay properly.
3. Many bacteria can secrete polysaccharides	c) by feeding an organic material formed by other organisms.
4. Without decomposers dead organisms	d) would not occur without bacteria.
5. Prokaryotic DNA differs from eukaryotic DNA in	e) that allow them to stick to things.
6. Heterotrophic bacteria procure their food	f) that it is associated with different proteins.

6. Put the parts of the sentences in the right order:

a. Exist, on, could, bacteria, earth, not, life, without.

b. 30, minutes, in, every, double, can, under, conditions, a, optimal, bacteria, population, or, size, 20.

c. Ways, bacteria, some, have, that, cells, from, eukaryotes, differ, in.

d. Division, most, cells, reproduce, bacterial, by, simple, the, cell.

e. A, many, are, of, also, capable, producing, stage, prokaryotes, dormant.

f. Years, of, be, may, able, spores, to, thousands, for, live, bacterial.

FOLLOW-UP ACTIVITIES

1. Prepare a dialogue with your partner discussing:

a) general information about the members of the kingdom Monera;

b) reproduction of bacterial cells;

c) spores.

UNIT 3

PROTISTA

PRE-READING AND READING TASKS

1. Make sure you know the following words:

Дата добавления: 2015-11-16