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Source: MY textbook-NCERT 12th Biology-Ch: Organisms and Population
(Pg 7 of pdf/Pg 223 of the book)

Is this graph for Partial regulators correct? Isn't it that animals tend to be regulators first and then when they can't maintain homeostasis anymore, they tend to conform aka adapt themselves to the surrounding for better survival?

So shouldn't the graph for Partial Regulators first be a straight-line parallel to the axis (signifying constant internal environment aka Homeostasis) upto certain External surroundings level and then be the inclined straight line when it behaves as conformer ?

I would like to know where I am wrong in my logic or Is it that The graph is wrong in my book ?

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    $\begingroup$ Why initial should be regulation? Upto a certain level? When the text says: Some species have evolved the ability to regulate, but only over a limited range of environmental conditions, beyond which they simply conform. Could it not be like confirming at both sides of limited range, ie conforming at low and high conditions. $\endgroup$
    – JM97
    Commented Oct 6, 2019 at 15:12
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    $\begingroup$ I haven't really encountered this term before and it seems there are not many original sources of this term; I cannot find any scientific article that uses this term. So this term is apparently not a standard one. Also, as pointed out by @JM97, most organism can achieve homeostasis only in a limited range and it doesn't have to be limited at one specific end of the spectrum. $\endgroup$
    – WYSIWYG
    Commented Oct 6, 2019 at 15:47

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I think, the graph you indicated, might saying the following matter:

Let's take an example. " Some snails and fish go into aestivation to avoid summer-related problems-heat and dessication." Now, when summer comes after the season Spring, the temperature gradually rises. The fishes can generally withstand upto a threshold limit of temperature, and conforms upto this threshold limit. When their comfortable weather breaks due to rising temperature, then they enter Aestivation and the graph now starts paralleling the X-axis.

Look, the graph doesn't parallel to the " Conformers' line" from the origin, but deviates with a little angle from that line : that implies the organism was trying to regulate against the external environment at first.

Undoubtedly, it's my own opinion, may carry some shortcomings generally.

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    – tyersome
    Commented Apr 13, 2021 at 16:44
  • $\begingroup$ well your point of view is really different and original, though I am a little skeptical about it, it really relates to the paraphrase written in the same book on the next page relating to Partial regulator $\endgroup$
    – Samardeep singh
    Commented Sep 6, 2021 at 20:40

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