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I. Many new words in the English language are formed by means of prefixes. Look at the prefixes below. What meanings do they add to words?

Co-, dis-, in-, im-, ir-, mis-, over-; pre-, re-, sub-, un-, super-, extra-, de-, macro-, micro-, semi-, anti-, mono-, multi-, uni-, poly-.

II. Match the following words with the prefixes from the previous exercise. Some of the words can take several different prefixes. What is the meaning of the resulting words?

Soluble; saccharide; existing; production; populated; natural; biology; organism; body; regular; approve; aware; cellular; understand; operation; matter; possible; vertebrate; system; ability; meter; molecule; conception; terrestrial; circle; infect; weight; conductor; rational; operate; believable.

III. Some of the English words consist of two or more components that function as one word. Match the words from the left and right columns to form such nouns or adjectives making necessary changes. Use these words in your own sentences

    1. phosphorus

    2. carbon

    3. pain

    4. head

    5. photo

    6. sun

    7. baby

    8. water

    9. air

    10. fire

    11. data

    12. soft

    13. plasma

    14. bone

    15. swim

      1. ache

      2. base

      3. brigade

      4. lipid -> 1. d) phospholipid

      5. condition

      6. glasses

      7. hydrate

      8. kill

      9. marrow

      10. membrane

      11. proof

      12. sit 7. l) -> babysitter

      13. suit

      14. synthesis

      15. ware

LISTENING COMPREHENSION

I. Listen to the following piece of information about origin of the eukaryotes. Choose the correct options to complete the statements below. In some cases more than one answer is possible. Before listening discuss the meaning of the words in the box below with your classmates or teacher

sediments

to be ingested

to get digested

to sit trapped

to be treated like

to nurture thoughts

successive generations

to account for

to be incomplete

compelling objections

to resolve a matter

to reside in

  1. Among the cell organelles that contain their own ribosome and DNA are:

a) chloroplasts; b) lyzosomes; c) vacuoles.

  1. The attempts to grow mitochondria in culture out of cells

a) have been successful;

b) have never produced the expected result;

c) have never been made.

  1. Eukaryotic cells appeared on earth

a) 2 billion years after prokaryotes;

b) 3 million years after prokaryotes;

c) 2 billion years ago.

  1. According to Lynn Margulis, Boston University, about a billion years ago earth was inhabited

a) by photosynthetic prokaryotes;

b) by several types of prokaryotes;

c) by prokaryotes and first eukaryotes.

  1. According to Lynn Margulis, Boston University,

a) some prokaryotes “infected” others;

b) some prokaryotes were parasites that lived within others;

c) Some prokaryotes got engulfed by others and survived within them

  1. The endosymbiotic theory is incomplete because

a) it does not account for a number of features that distinguish eukaryotes from prokaryotes;

b) chloroplasts and mitochondria lack nuclei;

c) mitochondria and chloroplasts are not the only organelles within the eukaryotic cell.

  1. The endosymbiotic theory

a) will soon be rejected as inconsistent;

b) has already been accepted as true;

c) can be further improved and developed.