Plant and Animals: External factors Flashcards

Question

Current | Prefix

Answer 1

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An organism’ natural timing devices regulate the cycle of circadian rhythms, this is an innate response/ behaviour, and endogenous.

Answer 2

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Are physical, mental, and behavioural changes that follow a 24 hour cycle

Answer 3

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Zeitgebers
A rhythimic environemtal cue that resets an internal clock

Answer 4

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Having an internal clock

Answer 5

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Having an external clock

Answer 6

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Genetically progammed

Answer 7

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Results of experience

Answer 8

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Physical or non living factors
eg. light, temp, gravity

Answer 9

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Influence due to other organisms
eg. competition, mutulism, predatation

Answer 10

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Change in an organisms environment to which it can respond

Answer 11

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A strucutre that detects stimuli

Answer 12

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A structure that carries out the response to a stimuli
eg. Cillia and flagella, muscle fibres, gland cells etc

Answer 13

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Stimuli - Receptor - CNS (central nervous system) - Effector - Response

Answer 14

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A rhythm that is free of external enviromental cue

Answer 15

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Suprachiasmatic nuclei; the site of the master clock in mammals

Answer 16

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Living organisms operate at an optimum range that fits their tolerance based on their species. If they are out of their optimum range they are therefore no longer in their fitted tolerance. This has the flow on effect of the organism suffering from physiological stress and if the organism is out of their fitted tolerance to the extreme it could lead to death.

Answer 17

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Any trait that results in an organism having a greater chance of surviving to an age where it can reporduce

Answer 18

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The opportunities provided by the habitat and the adaption of the organism enables it to take advantage of these opportunities. (Structural, behavioural, physiological, life history)