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Biology Mixed Test - 1

Biology Mix Test - 1

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Questions

Question 1 Multiple Choice (Single Answer)

Elytra is a pair of hardened wings in insects. It is used for

  1. only flying
  2. flying and protecting the hind wings
  3. protecting the insects from enemies
  4. protecting the hind wings
Question 2 Multiple Choice (Single Answer)

Filaria is caused by a worm called

  1. Trichinella spiralis
  2. Wuchereria bancrofti
  3. Ancylostoma duodenale
  4. Enterobius vermicularis
Question 3 Multiple Choice (Single Answer)

Which of the following statements is incorrect about the closed circulatory system?

  1. The blood flows through blood vessels.
  2. The blood flows very slowly in the vessels.
  3. Blood has high pressure in the vessels.
  4. The blood comes in direct contact with the tissues.
Question 4 Multiple Choice (Single Answer)

The most serious form of malaria is caused by

  1. Plasmodium ovale
  2. Plasmodium falciparum
  3. Plasmodium vivax
  4. Plasmodium malariae
Question 5 Multiple Choice (Single Answer)

Which of the following statements is true about veins?

  1. They are empty after the death of the animal.
  2. They do not collapse even after being cut.
  3. Their walls are thin and contain valves.
  4. Their blood flow is fast and intermittent.
Question 6 Multiple Choice (Single Answer)

Which of the following statements is not true about the open circulatory system?

  1. The blood flow is very fast.
  2. The blood pressure is very high.
  3. The blood flows through the sinuses.
  4. The blood never comes in direct contact with the tissues.
Question 7 Multiple Choice (Single Answer)

Which stage is absent in incomplete metamorphosis of insects?

  1. Egg
  2. Larva
  3. Pupa
  4. Naiads
Question 8 Multiple Choice (Single Answer)

Which of the following structures stimulates the ventricular systole?

  1. SA node
  2. AV node
  3. AV valve
  4. AV aperture
Question 9 Multiple Choice (Single Answer)

Which of the following statements about arteries is correct?

  1. They take blood from various body parts to the heart.
  2. They carry deoxygenated blood towards the heart.
  3. They carry blood with high pressure.
  4. They are located superficially.
Question 10 Multiple Choice (Single Answer)

In which of the following organisms is open circuation present?

  1. Toad
  2. Prawn
  3. Lizard
  4. Pigeon
Question 11 Multiple Choice (Single Answer)

Which of the following statements is true about the lymphatic system?

  1. It can easily be observed.
  2. It is free at one end.
  3. It is thinner than blood capillaries.
  4. It has a uniform diameter.
Question 12 Multiple Choice (Single Answer)

Sleeping sickness in humans is transmitted by

  1. Anopheles mosquito
  2. Aedes mosquito
  3. Sand fly
  4. Tse tse fly
Question 13 Multiple Choice (Single Answer)

Which of the following organs will receive less blood during strenuous exercise?

  1. The brain
  2. The skin
  3. The muscles
  4. The lungs
Question 14 Multiple Choice (Single Answer)

Which of the following animals have incompletely four chambered heart?

  1. Fishes
  2. Amphibians
  3. Reptiles
  4. Birds
Question 15 Multiple Choice (Single Answer)

Which of the following actions causes the 'lub' sound of heart beat?

  1. The closure of the semilunar valve.
  2. The opening of the semilunar valve.
  3. The closure of the AV valve.
  4. The opening of the AV valve.
Question 16 Multiple Choice (Single Answer)

Which of the following biochemical changes is not likely to happen in a person exercising hard?

  1. Increase in glycogen
  2. Increase in ADP
  3. Increase in lactic acid
  4. Increase in carbon dioxide
Question 17 Multiple Choice (Single Answer)

What is true about the AV node of the human heart?

  1. It conducts impulse very rapidly.
  2. It is highly contractile.
  3. It consists of modified muscle fibres.
  4. It is composed of modified nerve fibres.
Question 18 Multiple Choice (Single Answer)

Passing through which of the following structures will blood lose maximum O2?

  1. The tissue capillaries
  2. The alveolar capillaries
  3. The left atrium
  4. The arteries
Question 19 Multiple Choice (Single Answer)

Valves are not found in which of the following structures?

  1. Arteries
  2. Heart
  3. Veins
  4. Lymphatics
Question 20 Multiple Choice (Single Answer)

The opening of aortic valve is initiated when

  1. auricles contract
  2. auricular pressure exceeds aortic pressure
  3. ventricles contract
  4. auricular pressure exceed aortic pressure
Question 21 Multiple Choice (Single Answer)

Which of the following arteries is observed to measure the blood pressure?

  1. The common carotid
  2. The branchial
  3. The aorta
  4. The external iliac
Question 22 Multiple Choice (Single Answer)

As compared to artery, a vein has

  1. a thicker wall
  2. a narrower lumen
  3. more musculature
  4. less elastic tissue
Question 23 Multiple Choice (Single Answer)

The greater proportion of circulating blood is normally present in the

  1. heart
  2. large arteries
  3. large veins
  4. capillaries
Question 24 Multiple Choice (Single Answer)

In which of the following structures is the pulse rate lowest?

  1. Aorta
  2. Femoral artery
  3. Arterioles
  4. Capillaries
Question 25 Multiple Choice (Single Answer)

Match column A with B.
Column A: Column B:

  1. SA node A. Accessory chamber
  2. Water circulation B. Right auricle
  3. Sinus venosus C. Tricuspid valve
  4. Right A-V aperture D. Sponges
  1. 1-B, 2-D, 3-A and 4-C
  2. 1-D, 2-B, 3-A and 4-C
  3. 1-B, 2-D, 3-C and 4-A
  4. 1-B, 2-A, 3-D and 4-C
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