Tag: structure and functions of living organisms -ii

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Questions Related to structure and functions of living organisms -ii

Multiple choice evs structure and functions of living organisms -ii experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

The teeth present after the age of 8-12 is called as

  1. Milk teeth

  2. Temporary teeth

  3. Permanent teeth

  4. Both A and C
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Human teeth have two sets of teeth during their life i.e, one temporary set of milk and one permanent set. The temporary teeth or milk teeth are replaced by permanent teeth upon the age of 12 years. So the teeth present after 12 years of age is called permanent teeth.
So the correct answer is 'Permanent teeth'.
Multiple choice evs structure and functions of living organisms -ii experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

Soham is 6 years old. He was playing in the garden. One of his teeth fell as he dashed a pillar. He started crying because he was hurt. He also felt that his teeth will never come back and he will not be able to eat chocolates. How will you console him?

  1. By telling him that his tooth was milk tooth

  2. By telling him that his tooth was permanent tooth

  3. By telling him that his tooth will be replaced

  4. Both A and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Human teeth have two sets of teeth during their life: one temporary set (milk teeth) and one permanent set milk teeth are young teeth that are replaced by permanent or adult teeth up to 12 years.

So the correct answer is 'Both A and C'.

Multiple choice evs structure and functions of living organisms -ii experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

The teeth used for biting and cutting food are called as

  1. Molars

  2. Premolars

  3. Canines

  4. Incisors
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An adult human has 32 permanent teeth which of four types, namely incisors, canines, premolar, and molars. Such type of dentition is called heterodont dentition.

The teeth used for biting and cutting food are called as Incisors. They are small chisels shaped and have sharp edge help to bite the food.
So, the correct answer is "Incisors".

Multiple choice evs structure and functions of living organisms -ii experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

Which of the following is vestigial teeth found in human?

  1. Incisors

  2. Premolars

  3. Diphyodont

  4. Wisdom teeth
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Wisdom teeth are vestigial third molars, that help human ancestors in grinding down plant tissue. The skulls of human ancestors had larger jaws with more teeth to efficiently digest the cellulose that makes up a plant cell wall. As human diets changed, smaller jaws were naturally selected, yet the third molars or wisdom teeth still develop in humans.

Multiple choice evs structure and functions of living organisms -ii experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

Wisdom teeth in human is

  1. $3^{rd}$molar and 4 in number
  2. $3^{rd}$ molar and 2 in number
  3. $2^{nd}$molar and 4 in number
  4. $2^{nd}$ molar and 2 in number
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In humans, there are 32 teeth present in which four different types of teeth are present and is known as heterodont dentition. In these four types canines,

incisors, premolar and two molars are present are the permanent teeth but and are 28 in number but the third molar appears late in life and is known as wisdom tooth which is four in number an form 32 teeth.
So the correct option is '$3^{rd}$ molar and 4 in number'.

Multiple choice evs structure and functions of living organisms -ii experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

Which one is wisdom teeth

  1. Third molar, four in number

  2. Third molar, two in number

  3. Second molar, four in number

  4. Second molar, two in number
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Wisdom teeth are the third molars, and there are typically four of them in an adult set (one in each quadrant).

Multiple choice evs structure and functions of living organisms -ii experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

Similar cone-shaped teeth are

  1. Diphyodont

  2. Acrodont

  3. Homodont

  4. Thecodont

  5. Heterodont
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Homodont teeth are teeth that are all similar in shape and size, commonly found in many reptiles and fish. Heterodont refers to teeth of different shapes, like in humans.