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16. Give English equivalent to the following phrases.

Многоклеточные организмы, молекулярная биология, деление, клетка, наследственная информация, органеллы, яйцеклетка, исследование рака, раздел (науки), иметь дело с, бактерии, молекулярный уровень, цитология.

18. Answer the question according to the text.

1) What is cytology?

2) Is cytology and biology of a cell the same science?

3) What does cell biology study?

4) Who discovered the cell? 6) Give examples of unicellular and multicellular organisms.

7) What cells are the largest known cells?

8) Who developed the cell theory?

9) Where does the word cell come from?

10) What is it inside the cell?

11) What is biosynthesis?

12) What sciences are related to the cell biology closely?

19. Put the words in the right order and write down the sentences:

1) that studies cells/ is / scientific / a/ cell biology/ discipline /

2) basic /the /cell/ life/ functional/ of /is/ the/unit /

3) of/ called/ life //the cell / often / the building block / is /

4) and/ 10 /mass /a /typical/ size/ nanogram/ is /a cell / is /1/cell /μm/typical/

5) for/ that /the next/ functions/ and /regulating/all/ the /information /contain /for /cell/ hereditary/ to/necessary/ generation / cells /cells /information/ of/transmitting

6) provide/ differences /these /unifying/ similarities/and /theme fundamental /a

20. Create the project “Fantastic cells”

Think about unreal cells or cells of your dream and describe them (100-150 words). How do they look like? What properties do they have?

21. Give a detailed answer or write an essay on the following questions:

•The future of cytology.

•How cytology can help the mankind?

UNIT 4

Embryology

What does embryology study? How is an embryo developing? What is a zygote?

1. Read this text and translate it.

What is Embryology?

Embryology is the study of the formation of life, part of the studies with which developmental biology is concerned. Developmental biology examines how all forms of life begin, and how they develop into fully formed and functioning organisms.

Embryology looks at the very beginning of life from the one-celled organism, egg or sperm. Embryologists examine fertilization and track the development of the embryo until it bears a resemblance to its progenitors. For example, in human conception, embryologists would be interested in both sperm and egg, and the meeting of the two, and then would follow egg implantation and the growth of an embryo until it reaches the fetal stage. So in humans, the study of an embryo would last until about the second month of a pregnancy.

Aristotle was one of the first to champion the theory of epigenesis, the concept that life forms develop into complex organisms from fertilization. This was not a popular concept and was largely discarded in favor of the theory of reformations, which suggested that each human sperm was already a person in waiting. In the mid 18th century, Caspar Fredriech Wolff again set forth the concept of epigenesis. Through his study of chick embryos, Wolff realized that the body of an organism has stages of development.

Through vivisection, he observed the complexity of specific organs and contended that their development could not simply have occurred spontaneously, but must have developed over time. Later scientists followed his studies, and with the development and subsequent improvements of the microscope, Wolff's theories were found to be quite accurate. Wolff is credited as the "Father of Embryology," even though he did not first conceptualize epigenesis.

Today, the theories of embryology are easier to prove because of the accuracy with which we can examine DNA codes within a cell. There are several practical applications of embryology in the modern world. Embryology has given doctors the tools to create fertilized eggs for in vitro implantation. Embryology can also identify risk factors for serious genetic conditions within the fertilized egg and select the most viable eggs for implantation. The study of embryology has led directly to the concept of cloning, either for a whole organism or parts of an organism.

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