Tag: biology

Questions Related to biology

The hump of camel helps in storing

biology animal world oviparous and viviparous diversity and classification in animals adaptations in animals

  1. Water

  2. Grass

  3. Fat

  4. Urine

Show answer
Correct Option: C
Explanation:
A camel is adapted for xeric (desert) conditions. The following adaptations are found in a camel:
1. Its hooves are covered by a large sole which helps it to move on the hot slippery sand.
2. It has a hump on the back which is filled with fat. This food is utilized when the camel does not get anything to eat.
3. Water gets evenly distributed in different parts of its body and not in a specific pocket or an organ.
4. It excretes very little water from its body.
So, the answer is C.

Which of the following breed of sheep found only in Uttar Pradesh and Himachal Pradesh?

biology animal world oviparous and viviparous diversity and classification in animals adaptations in animals

  1. Bakhar wal

  2. Rampur Bushair

  3. Nali

  4. Lohi

Show answer
Correct Option: B

Study following statements and choose the correct alternative.
(P) Those organs which have the same internal structure but different functions, are called homologous organs.
(Q) Organs which have different basic design but have similar appearance and carryout similar functions are called analogous organs.
(R) The impressions of dead plants or animals that lived in the past are known fossils.

biology animal world oviparous and viviparous diversity and classification in animals adaptations in animals

  1. All the three (P, Q, R) statements are true

  2. Statements P and Q are true but R is false

  3. Only R is true

  4. All three statements are wrong

Show answer
Correct Option: A
Explanation:

The organs which have the same structure but are involved in performing the different type of functions are known as homologous organs. 

The organs which have similar functions but are structurally different are known as the analogous organs. 
The fossils are the imprints, casts or molds of the dead animals and plants which existed in the past. These fossils are used for the study of the ancient organisms. 
Thus, the correct answer is option A. 

Which of the following is incorrect match?

biology animal world oviparous and viviparous diversity and classification in animals adaptations in animals

  1. Polar bear - Eurythermal

  2. Archaebacteria - Hydrothermal vents

  3. Cyanobacteria - Thrive in Antarctic water

  4. Desert lizards - Body temperature fairly constant

Show answer
Correct Option: A
Explanation:
  • Polar bears are stenothermal because they can tolerate only a narrow range of temperature and are restricted to specific regions only. On the other hand, eurythermal animals can tolerate a wide range of temperature variations and thus have a wider distribution on earth.
  • Archaea are microorganisms that define the limits of life on Earth. They were originally discovered and described in extreme environments, such as hydrothermal vents and terrestrial hot springs. 
  • Cyanobacteria can be found in almost every terrestrial and aquatic habitat—oceans, freshwater, damp soil, temporarily moistened rocks in deserts, bare rock, and soil, and even Antarctic habitats, some of the driest and coldest ecosystems on the Earth.
  • Ectotherms like desert lizards do not use metabolic heat to maintain their body temperature but manage to keep their body temperature fairly constant by behavioural means. They bask in the sun and absorb heat when their body temperature drops below the comfort zone but move in to shade when the ambient temperature starts increasing.
  • So the incorrectly matched option is A.

Dominance hierarchies are most common when

biology animal world oviparous and viviparous diversity and classification in animals adaptations in animals

  1. resources are uniformly distributed throughout the environment

  2. resources are concentrated in one part of the environment

  3. parental care is wanting

  4. males are larger than females

Show answer
Correct Option: A
Explanation:

Dominance hierarchy is a type of social hierarchy that arises when members of a social group interact, to create a ranking system. In social living groups, members are likely to compete for access to limited resources and mating opportunities. In most cases the dominance hierarchy is relatively stable from day to day. 

So the correct option is 'resources are uniformly distributed throughout the environment'. 

Assertion  :  The functional unit of excretory organs of
                       lobsters is nephron

Reason  :      The filtration of blood occur in the
                      malpighian body (the glomerulus and
                     Bowman's capsule).


biology animal world oviparous and viviparous diversity and classification in animals adaptations in animals

  1. If both the assertion and the reason are true and the reason

    is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is

    not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true

Show answer
Correct Option: D
Explanation:

Nephron is the principal functional unit of the kidney of vertebrates. Its number reaches to one million in each kidney. Filtration of blood occurs in Malpighian body, later is composed of a tuft of capillaries called the glomerulus together with the cupped end of the renal tubules,
known as Bowman's capsule.

It can be said that some animals in their evolutionary development preferred to be conformers than regulators. 
Which of the following can be the best suited reason for it?

biology animal world oviparous and viviparous diversity and classification in animals adaptations in animals

  1. The metabolic of these organisms can occur at a very wide rang of temperature.

  2. Maintaining homeostasis is an energetically expensive process

  3. The enzymes of these organisms are functional at high temperatures.

  4. Both B and C

Show answer
Correct Option: B
Explanation:

Maintaining homeostasis, especially thermoregualtion is energetically expensive for many organisms. During the course of evolution, the costs and benefits of maintaining a constant internal environment were taken into consideration and thus some species preferred to be conformers.

One species is harmed whereas the other is unaffected. The interaction is

biology animal world oviparous and viviparous diversity and classification in animals adaptations in animals

  1. Amensalism

  2. Commensalism

  3. Parasitism

  4. Predation.

Show answer
Correct Option: A
Explanation:

Amensalism is a negative interaction in which one species is unaffected and other is harmed. In Commensalism one species is unaffected and other is benefited. Whereas in Parasitism and Predation one species is benefited other is harmed, So the correct option is "Amensalism"

Consider the following statements (a-d) each with one or two blanks (i) bears go into 1______  during winter to 2_____ cold weather (ii) A conical age pyramid with a broad base represents 3_________ human population (iii) A wasp pollinating a fig flower is an example of 4________ (iv) A area with high levels of species richness is know as 5_________. 
Which one of the following options, gives the correct fill ups for the respective blanks numbers from 1 to 5 in the statements.

biology animal world oviparous and viviparous diversity and classification in animals adaptations in animals

  1. 3-stable,4-commensalism,5-(marsh)

  2. 1-aestivation, 2-escape,3-stable,4-mutualism

  3. 3-expanding,4-commensalism ,5-biodiversity park

  4. 1- hibernation,2-escape,3-expanding,5-hot spot.

Show answer
Correct Option: D
Explanation:

(i) bears go into 1-hibernation during winter to 2-escape cold weather (ii) A conical age pyramid with a broad base represents 3-expanding human population (iii) A wasp pollinating a fig flower is an example of 4-mutualism (iv) A area with high levels of species richness is know as 5-hot spot.


So the correct option is '1- hibernation,2-escape,3-expanding,5-hot spot'.

circadian rhythms of our body is controlled by

biology animal world oviparous and viviparous diversity and classification in animals adaptations in animals

  1. brain

  2. kidney

  3. spinal cord

  4. none of the above

Show answer
Correct Option: A
Explanation:

(A)Circadian rhythms regulates the sleep wake cycle regulated by the pineal gland in the brain.

(B)Fight and flight hormones are regulated by kidney.
(C)Spinal cord regulates the reflexes.
So, the correct option is 'Brain'.