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.
Answer:
The last one: dinosaur footprints preserved in mud turned to rock
Fossils have to be physical remains of an animal.
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Pepsi actually contains more sugar than Coke, which clocks in at 39 grams of sugar. This Pepsi offshoot contains 160 calories and 42 grams of sugar. Orange soda generally contains a lot more sugar than regular cola; Orange Fanta contains 160 calories and 44 grams of sugar per can
Answer:
Chemical Change
Explanation:
Chemical Change. Chemical changes occur when bonds are broken and/or formed between molecules or atoms. This means that one substance with a certain set of properties (such as melting point, color, taste, etc) is turned into a different substance with different properties.
Answer: dehydration synthesis reactions and hydrolysis.
Explanation:
<em>Large biological molecules often assemble via dehydration synthesis reactions, in which one monomer forms a covalent bond to another monomer, releasing a water molecule in the process. </em>
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<em>The process of splitting the bond between monomers is called hydrolysis. Since a water molecule was lost during dehydration synthesis, hydrolysis brings the water back.</em>
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