Tag: biology

Questions Related to biology

Which of the following animal's body shows bilateral symmetry?

biology body movement gait of animals basics of joints joints and type of joints

  1. Starfish

  2. Jellyfish

  3. Earthworm

  4. Sponge

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Correct Option: A

The mallard duck possesses a keeled sternum. What is the function of this specialised bone structure?

biology body movement gait of animals basics of joints joints and type of joints

  1. To provide stability in water

  2. To provide a site of attachment for the large flight muscles

  3. To increase the body's surface area for heat exchange

  4. It is a weapon used in sexual competition between males

Show answer
Correct Option: B
Explanation:
A keel in bird anatomy is an extension of the sternum (breastbone) which runs axially along the midline of the sternum and extends outward, perpendicular to the plane of the ribs.
In birds, the sternum (typically) has a keel-like projection to which the pectoral muscles attach; these muscles provide the all-important downstroke in powered flight. In contrast, flightless birds lack a keeled sternum -- if you don't have big, strong flight muscles, you don't need a keel to attach them to.

The forelimbs of birds (or aves) are modified into 

biology body movement gait of animals basics of joints joints and type of joints

  1. Peak

  2. Neck

  3. Wings

  4. Legs

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Correct Option: C
Explanation:

the correct answer is 'wings'

Aves are popularly known as "Glorified Reptiles" in whom the forelimbs are modified to give rise to wings that aid the flight in them.
So the correct option is C.

The supportive structure of our pinna is also found in _______________.

biology locomotion and movement gait of animals basics of joints joints and type of joints skeleton, joints and muscles

  1. Tip of nose

  2. Ear ossicles

  3. Vertebrae

  4. Nails

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Correct Option: A
Explanation:

  • The kind of tissue that forms the supportive structure in our pinna (external ears) is also found in tip of the nose. 
  • As External pinna is made up of elastic cartilage. 
  • It is passage towards middle ear. Hence, The supportive structure of our pinna is also found in the tip of the nose.
So, the correct answer is 'tip of nose'.

Number of bones of face is

biology locomotion and movement gait of animals basics of joints joints and type of joints skeleton, joints and muscles

  1. 12

  2. 30

  3. 40

  4. 14

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Correct Option: D
Explanation:
The number of bones in face is 14. They are as inferior nasal concha (2), Lacrimal bones (2), Mandible (1), Maxilla (2), Nasal bones (2), Palatine bones (2), Vomer (1), Zygomatic bones (2).
So, the correct answer is '14'.

Major constituent of human body is

biology skeleton - movement and locomotion gait of animals basics of joints joints and type of joints skeleton, joints and muscles

  1. Skeleton

  2. Muscles

  3. Connective tissue

  4. Extracellular fluid

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Correct Option: A
Explanation:

  • A skeleton is the hard structure that protects the internal organs of a living thing. 
  • Skeletons can be inside the body or outside the body. 
  • In mammals, which include humans, the skeleton is made of bones. 
  • All the bones, when they are joined together, make the "skeletal system" of a body. Hence, the major constituent of the human body is a skeleton.
So, the correct answer is 'skeleton'.

Which is not the function of bones?

biology skeleton - movement and locomotion gait of animals basics of joints joints and type of joints skeleton, joints and muscles

  1. Protection of vital organs

  2. Haemopoiesis

  3. Muscle attachment

  4. Secretion of hormones

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Correct Option: D
Explanation:

The endocrine glands in the body such as a pituitary gland, thymus, thyroid gland, parathyroid and etc secrete various hormones in the body. The bones cannot secrete hormones as they lack glands to produce and secrete hormones. It helps in protection of vital organs, haemopoiesis, and muscle attachment.

So, the correct answer is 'Secretion of hormones'.

Presence of obturator foramen is a feature of

biology skeleton - movement and locomotion gait of animals basics of joints joints and type of joints skeleton, joints and muscles

  1. Frog

  2. Cockroach

  3. Rabbit

  4. None of the above

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Correct Option: C

The function of skeleton in the vertebrates is/are

biology skeleton - movement and locomotion gait of animals basics of joints joints and type of joints skeleton, joints and muscles

  1. Support

  2. Hearing

  3. Sound production

  4. All of the above

Show answer
Correct Option: A
Explanation:

The skeleton is the structural framework of the body. Our skeleton system contains 206 bones. Its main function is to support muscles and tissues. It also protects the vital organs, allows movement of bones and muscles and serves as the storage house for immature blood cells and minerals.

So, the correct option is A.

Innominate is

biology skeleton - movement and locomotion gait of animals basics of joints joints and type of joints skeleton, joints and muscles

  1. A nerve and an artery

  2. A nerve and a vein

  3. A vein and an artery

  4. A part of skeleton and an artery

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Correct Option: D
Explanation:

Term innominate is used both in the context of a skeletal system and circulatory system. In the circulatory system, innominate is one of the branches of the aortic arch. The arch of the aorta, located immediately beyond the ascending aorta, gives off three large branches.
1. The brachiocephalic trunk is a short artery formerly called the innominate. Its name means that is supplies the head and the arm. After extending upward somewhat less than 5 cm (2 inches), it divides into the right subclavian artery, which supplies the right side of the head and the neck. 
2. The left common carotid artery extends upward from the highest part of the aortic arch. It supplies the left side of the neck and the head.
3. The left subclavian artery extends under the left collar bone (clavicle) and supplies the left upper extremity. This is the last branch of the aortic arch.
Innominate bone in anatomy refers to either of the two bones that form the sides of the pelvis, consisting of three fused components, the ilium, ischium, and pubis. The non-technical name is hip bone.