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Zoology - 4 (B. Sc. Agriculture)

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In which mode of inheritance do you expect more maternal influence among the offspring?

  1. Autosomal

  2. Cytoplasmic

  3. Y-linked

  4. X-linked


Correct Option: B

The conservation of biodiversity is important for

  1. plants only

  2. animals only

  3. both plants and animals

  4. all living organisms


Correct Option: D
Explanation:

Biodiversity includes all living organisms, from a single celled microorganism to multicellular organisms. So, it should be conserved for all living organims.

Which of the following is not a parasitic infection?

  1. Coenurosis

  2. Ascariasis

  3. Osteoarthritis

  4. Enterobiasis


Correct Option: C
Explanation:

Osteoarthritis is the most common type of arthritis. OA is a chronic condition characterized by the breakdown of the joint’s cartilage. The breakdown of cartilage causes the bones to rub against each other, causing stiffness, pain and loss of movement in the joint.

_____ introduced modern systematics.

  1. Linnaeus

  2. John Ray

  3. Darwin

  4. Julian Huxley


Correct Option: D
Explanation:

Julian Huxley was one of the main architects of the modern evolutionary synthesis which took place around the time of World War II. He introduced modern systematics.

Enzymes act on the substrate in several ways, except by

  1. lowering the energy of the transition state of the substrate

  2. increasing the reaction entropy change

  3. providing an alternative pathway

  4. lowering the activation energy


Correct Option: B
Explanation:

They reduce the reaction entropy change by bringing substrates together in the correct orientation to react. Considering ΔH‡ alone overlooks this effect.

Tendons connect

  1. bone to bone

  2. bone to muscle

  3. nerve to bone

  4. skin to muscle


Correct Option: B

Directions: Choose the word that substitutes the given phrase.

The science of the origin of nature and the course of disease

  1. Plaate

  2. Ascetic

  3. Pathology

  4. Synonyms


Correct Option: C

In anaerobic respiration, there is a net gain of

  1. 2 ATP

  2. 3 ATP

  3. 38 ATP

  4. 10 ATP


Correct Option: A

Insects have malpighian tubules for

  1. digestion

  2. excretion

  3. filtration

  4. none of these


Correct Option: B
Explanation:

Insects have malpighian tubules for excretion 

The similarity between DNA and RNA is that both

  1. are double stranded

  2. have similar sugars

  3. are polymers of nucleotides

  4. have similar pyrimidine


Correct Option: C

Which of the following is known as the graveyard of RBC's?

  1. Liver

  2. Spleen

  3. Brain

  4. Heart


Correct Option: B
Explanation:

The spleen is an organ found in virtually all vertebrates. Similar in structure to a large lymph node, it acts primarily as a blood filter. The spleen plays important roles in regard to red blood cells (also referred to as erythrocytes) and the immune system. It removes old red blood cells and holds a reserve of blood, which can be valuable in case of hemorrhagic shock, and also recycles iron.

Which of the following statements regarding the pituitary gland is wrong?

  1. The pituitary gland is not connected to the hypothalamus.

  2. The pituitary gland is divided into adenohypophysis and neurohypophysis.

  3. On each side of the pituitary gland is the cavernous sinus.

  4. Disorders of the pituitary gland can cause hormonal and neurological defects in the body.


Correct Option: A
Explanation:

The gland is connected to a region of the brain called the hypothalamus by the pituitary stalk. Directly above the pituitary gland and in front of the pituitary stalk are the crossing fibers of the optic nerves, called the optic chiasm.

Two common characters found in centipedes, cockroaches and crabs are

  1. compound eyes and anal cerci

  2. jointed legs and chitinous exoskeleton

  3. green gland and tracheae

  4. book lungs and antennae


Correct Option: B

The three distinct types of fishes are jawless fish, the cartilaginous fish and the

  1. bony fish

  2. sword fish

  3. angler fish

  4. puffer fish


Correct Option: A

Match column I with column II.

 
Column I Column II
1. Autonomic nervous system i. Forebrain
2. Control centre of thinking ii. Brain and spinal cord
3. Central nervous system iii. Sympathetic and asympathetic nervous systems
4. Blood pressure is controlled by iv. Cerebellum
5. Activities like riding a bicycle are controlled by v. Medulla
  1. 1 - iii, 2 - i, 3 - ii, 4 - v, 5 - iv

  2. 1 - iv, 2 - iii, 3 - i, 4 - v, 5 - ii

  3. 1 - iii, 2 - i, 3 - v, 4 - ii, 5 - iv

  4. 1 - ii, 2 - iii, 3 - v, 4 - i, 5 - iv


Correct Option: A
Explanation:

2,4-D is a synthetic auxin, which is a class of plant hormones.

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