rhythms definitions

Question 1

biological rhythms

Answer 1

activities occurring at regular time periods

Question 2

circadian rhythm

Answer 2

describes a pattern of behaviour which runs a length of 24 hours
- linked to day and night - triggered by light availability

Question 3

diurnal

Answer 3

active during day and inactive during night

Question 4

nocturnal

Answer 4

active during night inactive during day

Question 5

crepuscular

Answer 5

active during sunlight and sunset

Question 6

circannual rhythm

Answer 6

seasons - length of days = 365 which is the time taken for earth to orbit
- used for hibernation and migration
- day length changes with seasons so circannual activities are triggered by day length - summer, autumn, winter, spring

Question 7

circatidal rhythm

Answer 7

tidal waves - in and out - organisms in high tidal zone have high activity in tide in and low in tide out

Question 8

circalunar rhythm

Answer 8

full moon, no moon, crescent - caused by moon and earth orbit = 29.5 days