Tag: experiments on digestive enzymes

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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 teeth of human are shovel-shaped and used for nibbling, cutting and tearing

  1. Canines

  2. Premolars

  3. Molars

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

Incisors are the front teeth shaped for cutting and nibbling. Canines are pointed for tearing, and molars are for grinding.

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

Primary dentition in humans differs from permanent dentition in not having one of the following teeth

  1. Canines

  2. Pre-molars

  3. Molars

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

Primary (deciduous) dentition lacks premolars. The permanent set includes premolars, which replace the primary molars.

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 has the maximum number of teeth?

  1. Opssum

  2. Horse

  3. Human

  4. Rat
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Opossums have the most teeth among land mammals - up to 50 teeth. Humans have 32, horses have around 36-44, and rats have 16. The answer is misspelled as 'Opssum' but refers to opossum.

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

Eye teeth are

  1. Upper incisors

  2. Lower incisors

  3. Lower canines

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

Canines in the upper arch are also often called “eye teeth,” which, when you come to think of it, is kind of a weird name for them. But the most common explanation is actually pretty simple: these teeth lie directly below the eye sockets.


So, the correct option is 'Upper canines'.

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 of the following pairs of types of teeth perform one common function as stated against it?

  1. Incisors, canines - Holding

  2. Canines, premolars - Biting

  3. Premolars, molars - Grinding

  4. Molars, incisors - Tearing
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Both premolars and molars are posterior teeth that feature broad, flattened surfaces specifically adapted for crushing and grinding food. The other pairings mismatch tooth types with functions, such as incisors being for biting and canines for tearing.

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

State whether the following statements are true or false.
When Van Leeuwenhoek examined scrapings of his teeth under a microscope after drinking hot coffee, he saw living germs in them.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Van Leeuwenhoek examined single-celled organelles and called them as animalcules when he was working with the lenses.

So, the correct option is 'False'.

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

Choose the correct answers from the alternatives given.
In mammals, mastication of the food is done by

  1. molars

  2. premolars

  3. incisors

  4. canines
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • The molars or molar teeth are large, flat teeth at the back of the mouth. They are more developed in mammals. 
  • They are used primarily to grind food during chewing.
  • Molars show a great deal of diversity in size and shape across mammal groups. Hence, in mammals, mastication of the food is done by molars.
So, the correct answer is 'molars'.

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

Carnassial teeth, which are pointed molars, would most likely be part of the dentition of a

  1. human

  2. cow

  3. lion

  4. hawk
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carnassial teeth. which are pointed molars, would most likely be part of the dentition of a carnivore

(A)Human is an omnivore
(B)A cow is a herbivore
(C)Lion is a carnivore
(D)Hawk is a herbivore
So, the correct answer is 'Lion'