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svetlana [45]
3 years ago
6

Current studies on frogs and wildlife indicate that hormonally active agents (HAAs) are __________. a. found in insecticides and

should be removed b. found in radionuclides in parent rock materials c. abnormalities associated with developmental and reproductive systems d. causing lung cancer e. creating new forms of lizards
Biology
1 answer:
melomori [17]3 years ago
3 0

The right answer is A.

The term "hormonally active agent" (or endocrine disruptor) refers to any molecule or compound chemical agent, xenobiotic having hormono-mimetic properties and described as a cause of physiological abnormalities, and in particular reproductive abnormalities. Some examples are PCB, TCDD, DDT. Some of them were used as pesticides and are now banned for use. Their traces always exist at the soil level due to their persistence.

These agents are most often associated with breast cancer.

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Answer:

there will be less caterpillars , crows, and mice

Explanation: the increase in bluejays will hunt more mice and caterpillars which will leave less food for crows causing them to move

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The enzyme responsible for converting androgens to estrogens is select one:
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Que son los nutrientes
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The last common ancestor of all animals was probably a ________. A. unicellular chytrid B. multicellular algae C. multicellular
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Option (D) flagellated protist is correct.

The last common ancestor of all animals was probably a flagellated protist.

<h3>What is a Protist?</h3>
  • Any eukaryotic organism that is not an animal, plant, or fungus is referred to as a protist.
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  • Protozoa is another name for protists that resemble animals. Some are parasites as well.
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brainly.com/question/1626285

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4 0
1 year ago
When the polymerase chain reaction (PCR) is used to amplify segments of DNA, the sample is first heated, and then cooled, in cyc
baherus [9]

Answer:

At least 17 PCR cycles or 16 PCR cycles

Explanation:

As we know -

In one chain of  heating and cooling  of polymerase chain reaction (PCR), the strands of DNA gets doubled.

The general mathematical representation of this is

{2^n - (2 *  n)}

where "n" is the number of PCR cycles.

It is given that DNA strands  to be produced is 16 times the original quantity of DNA.

So the PCR cycle must be carried out at least 17 times in order to have DNA strand not less  than 16 times the original quantity of DNA

8 0
2 years ago
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