Physical factors Flashcards

1
Q

The functional or behavioral response of an organism to changes of duration in daily, seasonal, or yearly cycles of light and darkness.

A

Photoperiodism

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2
Q

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.

A

Light intensity

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3
Q

An animal behavior characterized by being active during the night and sleeping during the day.

A

Nocturnal

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4
Q

Active in the daytime.

A

Diurnal

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5
Q

The condition or period of an animal or plant spending the winter in a dormant state.

A

Hibernation

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6
Q

Prolonged torpor or dormancy of an insect, fish, or amphibian during a hot or dry period.

A

Aestivation

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7
Q

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.

A

Counter - current blood flow

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8
Q

Seasonal movement of animals from one region to another.

A

Migration

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9
Q

Living only for a year or less, perpetuating itself by seed.

A

Annual (plant)

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10
Q

Shedding its leaves annually.

A

Deciduous (plant)

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11
Q

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.

A

Bulbs (plant)

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12
Q

Relating to or denoting a plant that retains green leaves throughout the year.

A

Evergreen (plant)

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13
Q

A rounded underground storage organ present in plants such as crocuses, gladioli, and cyclamens, consisting of a swollen stem base covered with scale leaves.

A

Corms

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14
Q

Stems that grow horizontally underground and generally have a thickened stem that is used for storage.

A

Tubers and rhizomes

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