Physical factors Flashcards
The functional or behavioral response of an organism to changes of duration in daily, seasonal, or yearly cycles of light and darkness.
Photoperiodism
The energy hitting an area over some time period. … A limiting factor could be the amount of chlorophyll molecules that are absorbing thelight. At a very highintensityoflight, the rate of photosynthesis would drop quickly as thelightstarts to damage the plant.
Light intensity
An animal behavior characterized by being active during the night and sleeping during the day.
Nocturnal
Active in the daytime.
Diurnal
The condition or period of an animal or plant spending the winter in a dormant state.
Hibernation
Prolonged torpor or dormancy of an insect, fish, or amphibian during a hot or dry period.
Aestivation
Blood flowingfrom the body core to the periphery (like the legs & feet) carries heat that can be readily lost through the skin. However, the vein returningbloodto the body core lies alongside the artery takingbloodto the feet.
Counter - current blood flow
Seasonal movement of animals from one region to another.
Migration
Living only for a year or less, perpetuating itself by seed.
Annual (plant)
Shedding its leaves annually.
Deciduous (plant)
A rounded underground storage organ present in some plants, notably those of the lily family, consisting of a short stem surrounded by fleshy scale leaves or leaf bases, lying dormant over winter.
Bulbs (plant)
Relating to or denoting a plant that retains green leaves throughout the year.
Evergreen (plant)
A rounded underground storage organ present in plants such as crocuses, gladioli, and cyclamens, consisting of a swollen stem base covered with scale leaves.
Corms
Stems that grow horizontally underground and generally have a thickened stem that is used for storage.
Tubers and rhizomes
