Bioaccumulation of this chemical lead to bird eggs with weak shells and nonviable offspring:

2 answers:

7 0

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.

ELEN [110]4 years ago

6 0

Bioaccumulation of the chemical DDT lead to weakened shells in birds, especially those of eagles.

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Which of the following functions in multicellular organisms is similar to the function of DNA in unicellular organisms?

Igoryamba

Answer: They contain DNA and RNA, they can exhibit a wide range of lifestyles, and they are essential to almost every ecosystem.

Explanation:

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2 years ago

PLEASE HURRY!!!!!If a bag that is permeable to water only has a solution in it of 70% NaCl (table salt) and it is placed into a

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Answer:

Water will move into the beaker.

Explanation:

Only water can move between the bags. The water and the NaCl naturally want to reach equilibrium, so since the side with 80% NaCl is more concentrated, the water will move there to make it less concentrated. Both inside the back and in the beaker will reach 75% NaCl.

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3 years ago

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The two kingdoms are Animalia and Fungi

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A student isolates, purifies, and combines in a test tube a variety of molecules needed for DNA replication. After adding some D

aivan3 [116]

Answer:

DNA ligase

Explanation:

DNA replication is an enzyme mediated, 3-step process during which the DNA molecule produces a copy of itself. The 3 steps involved are as follows;

initiation
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Initiation involves the unwinding of the double helix structure of the DNA using DNA helicase enzyme

Elongation involves binding of RNA primer to the DNA strands and addition of bases to the primer to elongate the new chains. Bases are added to the leading strand continuously while the lagging strand is replicated in short segments (okazaki segments).

Termination involves the unbinding of RNA primer and substitution of its bases by DNA bases. The Okazaki fragments are then joined together using the DNA ligase enzyme.

The short, numerous segments of DNA observed in the mixture is the Okazaki fragments of the lagging strand. This is due to the absence of the enzyme involved in the joining of these fragments.

Hence, the answer is DNA ligase.

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3 years ago

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A fertilized cell develops into a MATURED ORGANISM

organism during the cell cycle .

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