Tag: biology

Questions Related to biology

Which of the following is the most commonly used classification scheme?

biology living world and classification of microbes modern classification system traditional method of animal classification salient features of five kingdoms

  1. Linnaeus, five kingdom scheme

  2. Whittaker, five kingdom scheme

  3. Darwin, five kingdom scheme

  4. Hooke, five kingdom scheme

Show answer
Correct Option: B
Explanation:
R.H. Whittaker proposed the five kingdom classification in the year 1969. It is the modern or latest classification system of organisms which is most commonly used. It classifies the organisms in the groups Monera, Protista, Fungi, Plantae and Animalia. The classification is performed on the basis of the structure of cell, complexity of organisms, mode of nutrition and phylogenetic relationship.
Thus, the correct answer is option B.

Carolus Linnaeus was from

biology living world and classification of microbes modern classification system traditional method of animal classification salient features of five kingdoms

  1. Sweden

  2. U.K

  3. Holland

  4. France

Show answer
Correct Option: A
Explanation:

Carolus Linnaeus (23 May 1707 10 January 1778), also known as Carl von Linn or Carl Linnaeus was a Swedish botanist, zoologist, and taxonomist, who established conventions for naming living organisms still in general scientific use today, which is called as the binomial nomenclature. 
Thus, the correct answer is option A.

Choose the incorrect match from the following in Whittaker's classification.

biology living world and classification of microbes modern classification system traditional method of animal classification salient features of five kingdoms

  1. Archeae - Monera

  2. Diatoms - Protista

  3. Lichens - Fungi

  4. Green algae - Plantae

Show answer
Correct Option: C
Explanation:
A lichen is not a single organism, but the result of a partnership (mutualistic symbiosis) between a fungus and an alga or cyanobacteria. So they are not particularly classified under one single kingdom because it consists of two or more mutualistic symbiotic organisms.
So the correct option  is 'Lichens -fungi'.

Which of the following is a universal blood donor?

biology animal tissues fluid connective tissue tissues of animals animal tissues and its type

  1. A

  2. B

  3. AB

  4. O

Show answer
Correct Option: D
Explanation:

A person with blood group O is considered as universal donor as it does not contain any antigens which can trigger the production of antibodies in a person with any of the other three blood groups i.e. A, B or AB. Thus, option D is correct.

How many possible genotypes are there for ABO blood groups in man?

biology animal tissues fluid connective tissue tissues of animals animal tissues and its type

  1. Three

  2. Four

  3. Six

  4. Eight

Show answer
Correct Option: C
Explanation:
 Genotype   Blood types
 $I^AI^O$ or $I^AI^A$ A blood type
 $I^AI^B$  AB blood type
 $I^BI^O$ or $I^BI^B$  B blood type
 $I^OI^O$  O blood type

There are six possible genotypes for the ABO blood groups in human.
The chart here shows the different genotypes, that make up the blood groups.
Therefore, the correct answer is option C.

Which of the following blood group is a universal donor?

biology animal tissues fluid connective tissue tissues of animals animal tissues and its type

  1. $AB^{+ve}$

  2. $O^{+ve}$

  3. $AB^{-ve}$

  4. $O^{-ve}$

Show answer
Correct Option: D
Explanation:

People with type O- negative blood are the universal donor for the whole blood. That means that, anyone can receive this blood type. Being O- negative, this blood group is compatible with all the blood groups, A${^+}$and A${^-}$ve, B${^+}$ve, B${^-}$ve, and AB${^+}$, AB${^-}$ve. And the chances of rejection is the least.
Therefore, the correct answer is option D.

A person with blood group O has 

biology animal tissues fluid connective tissue tissues of animals animal tissues and its type

  1. Only anti- A antibodies

  2. Only anti- B antibodies

  3. Both anti- A and anti- B antibodies

  4. Both A and B antigens

Show answer
Correct Option: C
Explanation:

The blood group found in human beings are of four principal types: A, B, AB and O. These types are differentiated on the basis of two antigens A and B and two antibodies A and B present in the blood types. The specific combination of antigens and antibodies determines an individual's blood type. A person with blood group O has no antigen on the surface of the RBC but has both, anti- A and anti- B antibodies in his plasma.

Therefore, the correct answer is option C.

Who among the following discovered the conditioned reflexes?

biology control and coordination in living organisms reflex action innate and learned behaviour coordination in human beings- chemical control

  1. Sherington

  2. Hill

  3. Pavlov

  4. Berstain

Show answer
Correct Option: C
Explanation:

Conditioned reflex is automatic responses to certain stimuli learnt during lifetime/training. It was studied by Russian physiologist Ivan Pavlov during his experiment on induction of salivation in dogs. Thus, the correct answer is option C.

Which one does not involve brain ?

biology nervous system of man reflex action innate and learned behaviour coordination in human beings- chemical control

  1. Spinal reflex

  2. Cerebral reflex

  3. Cranial reflex

  4. Voluntary action

Show answer
Correct Option: A
Explanation:

Reflex is an involuntary and instantaneous action in response to a stimulus.

  1. A spinal reflex is a reflex action is controlled by spinal cord and related sensory afferent and an efferent muscle without the influence of brain like we remove our hand when we touch hot object.
  2. Cerebral reflex is an involuntary controlled action that involves brain like a closing of eyes in an exposure of light.
  3. Cranial nerve is mediated by the pathway that includes cranial nerves and brain includes the peripheral and central nervous system.
  4. Voluntary actions are those which depends on our will like eating, bathing etc. and controlled by the cerebellum.
The correct option is "Spinal reflex".

Which biologist first noticed that the muscles of disected frog legs twitched wildly when a spark from an electric machine struck them?

biology nervous system of man reflex action innate and learned behaviour coordination in human beings- chemical control

  1. Georges Cuvier

  2. Franz Joseph Gall

  3. Kaspar Friedrich Wolf

  4. Luigi Galvani

Show answer
Correct Option: D
Explanation:

Luigi Galvani was an Italian physician who demonstrated what we now understand to be the electrical basis of nerve impulses when he made frog muscles twitch by jolting them with a spark from an electrostatic machine. So, the correct option is "D" (Luigi Galvani).