Bio accumulation of DDT lead to bird eggs with weak shells and non viable offspring. The lethal effects of DDT on birds was first noted in 1950; scientists discovered that earthworm was accumulating the DDT pesticide and that the robins that were preying on the earthworms were been poisoned. Further research revealed that the chemical cause thinning of the egg shell and production of non viable offspring. The chemical has since been banned in USA.
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Blue winged warblers are the popular species having distinct Buzz Buzz sounds. They are most likely to live in bushy fields and known as worm eater. Their favorite food is insects and spiders.
As the springs arrives, it will affect the blue winged warbles in a very positive way. They will be more likely to reproduce in spring. They will also find more food and shelter in spring.
Pragma <span>is not one of rusbult and colleagues' (1986, 1987, 1998) three ways of coping with a failing relationship.
</span>Pragma<span> is a pragmatic, practical, mutually beneficial relationship. The EVLN framework was developed by rustbult and her colleagues for personal love and marriage relationships.</span>
Answer: <u>Sinks towards the outer core
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Explanation: The material which is less dense, means it is lighter in weight. Such substances tend to move more towards the crust of the Earth, whereas the heavier substances like iron, is more towards the core or centre of the Earth. This is because heavier substances tend to sink deeper. That’s why the light elements are found in the crust section of the Earth.
