Advertisements
Advertisements
प्रश्न
What is diapause and its significance?
उत्तर
Under unfavourable conditions, many zooplankton species in lakes and ponds are known to enter diapause, a stage of suspended development.
APPEARS IN
संबंधित प्रश्न
During a school trip to 'Rohtang Pass', one of your classmate suddenly developed 'altitude sickness'. But, she recovered after sometime.
(a) Mention one symptom to diagnose the sickness.
(b) What caused the sickness?
(c) How could she recover by herself after sometime?
Explain with the help of suitable examples the three different ways by which organisms overcome their stressful conditions lasting for short duration.
List the various abiotic environmental factors.
Answer the following question.
‘‘Organisms may be conformers or regulators.’’ Explain this statement and give one example of each.
The figure given below is a diagrammatic representation of response of organisms to abiotic factors. What do A, B and C represent respectively.
| S. No. | A | B | C |
| a. | Conformer | Regulator | Partial Regulator |
| b. | Regulator | Partial Regulator | Conformer |
| c. | Partial Regulator | Regulator | Conformer |
| d. | Regulator | Conformer | Partial Regulator |
Assertion (A): A person goes to high altitude and experiences ‘altitude sickness’ with symptoms like breathing difficulty and heart palpitations.
Reason (R): Due to low atmospheric pressure at high altitudes, the body does not get sufficient oxygen.
In the light of the above statements, choose the correct answer from the options given below.
Assertion(A): A person goes to high altitude and experiences ‘altitude sickness’ with symptoms like breathing difficulty and heart palpitations.
Reason(R): Due to low atmospheric pressure at high altitudes, the body does not get sufficient oxygen. In light of the above statements, choose the correct answer from the options given below.
Define aestivation.
Why do all the fresh water organisms have contractile vacuoles whereas majority of marine organisms lack them?
Give one example for the following:
Antifreeze compound seen in antarctic fish
