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mr Goodwill [35]
2 years ago
7

PSYCH Having a family history involving anxiety disorder, experiencing or witnessing a traumatic event, or having a history of a

buse are all __________ of anxiety disorders.
A. common symptoms
B. risk factors
C. causes
D. thinking styles
Biology
2 answers:
melisa1 [442]2 years ago
7 0

Answer:

B) risk factors

Explanation:

EDGE 2021

crimeas [40]2 years ago
3 0

The answer is B. RISK FACTORS

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The moth species Biston betularia has two color morphs, or variants. One has a speckled white and black color, while the other i
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D. Changes in the environment changed each morph's ability to evade predation in different ways.

Explanation:

The moth species<em> Biston betularia</em> has two color morphs, or variants. One has a speckled white and black color, while the other is all black. Over the period of time, the distribution of moths dramatically changed between 1900 and 1950 in such a way that black morph became dominant but speckled morphs became very much declined in abundance. The reasons behind this change was heavy industrial pollution in UK between 1900 and 1950.

When the environment became very polluted, dark and blackish, the speckled moth had more chanced of getting eaten by predators thats why they declined in number  as compared to black morphs. On the other hand, backgrounds of grime and soot made black morphs less visible to the predators and they survived well. This is an excellent example of natural selection that only those specie better survive that have the ability to cope better with adverse environmental fluctuations.

Therefore, option D is best option.

Hope it help!

8 0
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