The repeated sequence of events which occur at about 24 hours interval in an organism is called ………
a) dioannual rhythm
b) lunar rhythm
c) tidal rhythm
d) circadian rhythm
Which of the following animals have their greatest degree of activity during the day?
a) nocturnal
b) diurnal
c) circadian
d) corpuscular
Explanation: anything that takes place in the daytime
Which of the following animals have their greatest degree of activity during twilight time?
a) nocturnal
b) diurnal
c) biological
d) corpuscular
Explanation: Twilight, the time between dawn and sunrise or between sunset and dusk; "Twilight Time". A red fox at dusk is corpuscular animal
Which of the following animals have their greatest degree of activity during the darkness or night?
a) nocturnal
b) diurnal
c) biological
d) corpuscular
Explanation: being active or happening at night rather than during the day
Aestivation
is also known as………
a) spring sleep
b) summer sleep
c) winter sleep
d) autumn sleep
Explanation: The organisms respond to unfavourable conditions by suspending their activities and go into a period of deep sleep. Summer sleep is called aestivation.
In which of the following animals, biological clocks/timing devices have been highly evolved?
a) birds
b) bees
c) dogs
d) both a and b
