Tag: biology

Questions Related to biology

Soil carried by gravity is

biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

  1. Alluvial

  2. Eluvial

  3. Colluvial

  4. Glacial

Show answer
Correct Option: C

An adult has ............. teeth. 

biology structure and functions of living organisms -ii role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. 20

  2. 24

  3. 28

  4. 32

Show answer
Correct Option: D
Explanation:

A normal adult mouth has 32 teeth. 

  •  Incisors: The middlemost four teeth on the upper and lower jaws.
  • Canines: The pointed teeth just outside the incisors. 
  • Premolars: Teeth between the canines and molars.
  • The molars or molar: teeth are large, flat teeth at the back of the mouth. Hence, an adult has 32 teeth.
So, the correct answer is '32'.

Cavity present in the tooth is called as

biology structure and functions of living organisms -ii role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. Pulp cavity

  2. Nasal cavity

  3. Abdominal cavity

  4. Chest cavity

Show answer
Correct Option: A
Explanation:

Pulp cavity is the central cavity of a tooth containing the dental pulp and being made up of the root canal and the pulp chamber. Nasal cavity is present in nose, abdominal cavity in abdomen and chest cavity in chest.

Therefore, the correct answer is option A.

The study of teeth is called as

biology structure and functions of living organisms -ii role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. Dentistry

  2. Dermatology

  3. Neurology

  4. Cardiology

Show answer
Correct Option: A
Explanation:

The study of teeth generally referred to as dentistry. It is a branch of medicine that involves the study, diagnosis, prevention, and treatment of diseases, disorders and conditions of the dentition along with oral cavity, including the oral mucosa, and the adjacent and related structures and tissues of the maxillofacial zone.

We chew the food with the

biology structure and functions of living organisms -ii role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. Teeth

  2. Tongue

  3. Mouth

  4. None of the above

Show answer
Correct Option: A
Explanation:
Mastication or chewing is the process by which food is crushed and ground by teeth. It is the first step of digestion, and it increases the surface area of foods to allow more efficient break down by enzymes. During the mastication process, the food is positioned by the cheek and tongue between the teeth for grinding. The muscles of mastication move the jaws to bring the teeth into intermittent contact, repeatedly occluding and opening. As chewing continues, the food is made softer and warmer, and the enzymes in saliva begin to break down carbohydrates in the food. After chewing, the food (now called a bolus) is swallowed. It enters the esophagus and via peristalsis continues on to the stomach, where the next step of digestion occurs.

Match the following.

A. Incisors 1. Grinding teeth
B. Canines 2. Cracking teeth
C. Premolars 3. Cutting teeth
D. Molars 4. Tearing teeth
biology structure and functions of living organisms -ii role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. A- 2, B- 4, C- 1, D- 3

  2. A- 2, B-1 , C- 4, D- 3

  3. A- 3, B- 2, C- 4, D- 1

  4. A- 3, B- 4, C- 2, D- 1

Show answer
Correct Option: D
Explanation:

Incisor is a narrow-edged tooth at the front of the mouth, adapted for cutting. In humans there are four incisors in each jaw. On each side of the incisors, at the corners of the mouth, are the canines. These teeth have one cusp, or pointed edge, and are used for holding or grasping food, and are very strong, stable teeth. Behind the canines are the premolars, which are designed for holding food like the canines because they have cusps, but they also function to crush food. Sometimes these teeth are referred to as bicuspids, meaning two cusps, but this is not always accurate because some premolars may have three cusps. Therefore, the term premolar is preferred. The teeth farthest back in the mouth are the molars. These teeth have broad chewing surfaces with four or five cusps, and are designed for grinding food. Thus, option D is correct.

Tube feet is the locomatory organ of

biology our skeletal system and the skin bones and movements joints in the human body joints

  1. Starfish

  2. Jellyfish

  3. Crop fish

  4. Silverfish

Show answer
Correct Option: A
Explanation:

Tube feet move the star fish around. They are part of the water vascular system.

Which one of the following is a flat bone?

biology our skeletal system and the skin bones and movements joints in the human body joints

  1. Carpal

  2. Vertebrae

  3. Incus

  4. Ribs

Show answer
Correct Option: D
Explanation:
  • Flat bones are made up of a layer of spongy bone between two thin layers of compact bone. They have a flat shape, not rounded
  • The flat bones are the occipital, parietal, frontal, nasal, lacrimal, vomer, hip bone (coxal bone), sternum, ribs, and scapulae.
  • Hence ribs are flat bones.
  • So, the correct answer is'Ribs'.

Which of the following is responsible for the protection of soft tissues?

biology our skeletal system and the skin bones and movements joints in the human body joints

  1. Long bones

  2. Flat bones

  3. Irregular bones

  4. Both A and C

Show answer
Correct Option: B

The main types of bones in terms of shape are

biology our skeletal system and the skin bones and movements joints in the human body joints

  1. Flat bones

  2. Irregular bones

  3. Short bones

  4. All of the above

Show answer
Correct Option: D
Explanation:
  • There are 6 Types of bone. They are classified by shape as:
  1. Long Bones.
  2. Short Bones.
  3. Flat Bones.
  4. Irregular Bones.
  5. Sesamoid Bones.
  6. Sutural Bones. Hence, The main types of bones in terms of shape are flat bones, Irregular bones and Short bones.
So, the correct answer is 'All of the above'.