What are the Characteristics of Class Mammalia
Characteristics of Class Mammalia
- i) Highly advanced animals are included in this group.
- ii) Man is also a mammal.
iii) Their body is covered with hairs. But in few some areas are restricted by hairs.
- iv) Their skin is provided with sweat glands, scent glands, sebaceous glands and mammary glands.
- v) Fleshly external ears are present.
- vi) Moveable eyelids are present.
vii) Two sets of teeth are present. Milk teeth are replaced by permanent teeth.
viii) Brain if highly developed.
- ix) Twelve pairs of cranial nerves are present.
- x) Circulatory system has four-chambered heart.
- xi) Sexes are separate.
xii) Most of them have internal fertilization and fetus develop inside the body of female.
xiii) Female give birth to their children.
xiv) They feed their children by giving milk from mammary glands.
- xv) They are worm blooded animals. They can maintain their body temperature as per environment.
Groups of Mammals:
There are three groups of mammals.
- i) Egg Laying mammals.
- ii) Pouched mammals.
iii) Placental mammals.
Note: The reasons for which they can be expelled from the university are prescribed specifically in the statute of each educational institution (item “d” of Article 13 of the RF Law “On Education”) – therefore, take the trouble to read this very statute for the beginning. But the standard provisions of universities also contain general rules, according to which, they can be expelled for the following reasons: For underachievement. Unsuccessful, you will be considered if you do not pass at least one exam or test by the end of the session. It is possible to designate you at the presentation of the dean of the faculty by the order of the rector with the phrase “for academic failure”, if in due time you had several debts for exams – as unsatisfactory assessments, as well as non-admission to exams and non-appearance on these without valid reasons. You can leave the university if, after the time fixed by the rector’s order, you have one or more debts on credits or exams – so do not take risks, gentlemen…