Page 284 - 3 STEPS YDT ENGLISH

ENGLISH

33. Which of the following is true about the biology of
32. - 34. soruları aşağıdaki parçaya göre cevaplayınız. mammals according to the passage?

A) Monotremes are a type of mammal which give birth to
Mammals have spread successfully over the entire world, live young.
and have even conquered extreme habitats such as deserts B) The structure of the mammal heart helps blend oxygen-
and the Arctic. In spite of all external diversities, they have rich and oxygen-deficient blood.
numerous characteristics in common. Mammals are the
C) The hearts of mammals are unique in terms of
most highly developed vertebrate animals. Their constant
exchanging oxygen and carbon dioxide.
body temperature grants them a life largely independent of
D) Long respiration is a characteristic limited to certain types
temperatures of the surrounding areas. They achieve constant
of mammals.
body temperature by a high food intake – in comparison to
reptiles, for example – and an increased rate of metabolism. E) The foetus inside a female is able to survive thanks to the
Long respiration, typical of mammals, supplies the body cells placenta and umbilical cord.
efficiently with oxygen. The heart consists of two atria and
two ventricles, which are completely separated from each
other. This prevents the mixing of oxygen-rich and oxygen-
deficient blood. All mammals, except for the egg-laying
monotremes, give birth to live young. During pregnancy, the
foetus is linked to the circulatory system of the female and is
supplied with nutrients via the placenta and umbilical cord.
The exchange of oxygen and carbon dioxide also takes place
using this route.

32. Which of the following is true about mammals? 34. What is the passage mainly about?
A) As a result of their adaptation to living in different habitats A) Mammal diversity on the planet
around the world, their physical appearances have B) Distribution of mammals in the world
become varied.
C) Common features of mammals
B) Compared to reptiles, mammals consume a much
D) Differences between mammals and reptiles
higher amount of food in order to maintain their body
temperatures. E) Reproduction differences in mammals
C) Thanks to their oxygen-rich blood, they are able to
nurture their offspring.
D) Their increased rate of metabolism has helped them to
be highly sophisticated animals.
E) They share several similarities with reptiles in terms of
nutrition and food intake.

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