Natural Cycles: Circadian Rhythms

The video explains circadian rhythms, which are daily cycles of activity in living organisms. It describes how animals like deer and elk are more active at dawn and dusk, while others like owls, moths, and bats are nocturnal, being most active at night. The video also covers diurnal organisms, such as many birds and humans, who are active during the day and rest at night.

What is the term for the 24-hour cycle that influences animal behavior?

• Diurnal rhythm

• Nocturnal cycle

• Circadian rhythm

• Biological clock

Which animals are more active during dawn and dusk?

• Owls and bats

• Bats and moths

• Deer and elk

• Moths and owls

What term describes animals that are most active at night?

• Diurnal

• Nocturnal

• Crepuscular

• Daytime

Which of the following is an example of a diurnal organism?

• Moths

• Owls

• Humans

• Bats

What is the primary activity pattern of most birds?

• Nocturnal

• Diurnal

• Crepuscular

• Atypical