A scientist has correctly gone through all the possible steps in a dichotomous key, but has not identified an insect. Which most likely describes why he did not identify the insect?

Answers

Answer 1

Answer: The answer to this question is letter C. The organism evolved during identification.
A scientist has correctly gone through all the possible steps in a dichotomous key, but has not identified an insect. He was not able to identify the insect because the organism evolved during identification.

Choices to this question are:
A) The scientist must have made a mistake.
B) The insect might be an unknown variation or a new species.
C) The organism evolved during identification.
D) The dichotomous key had to many questions.

Answer 2

Answer:

Answer;

The insect might be an unknown variation or a new species.

Explanation;

A dichotomous key is a biological tool that is used by scientists to identify unknown organisms. It is used to identify organisms in an ecosystem such as trees, mammals, fish, etc.
Dichotomous key consist of a series of steps or statements about a specific characteristics of organisms that leads to the correct name of a given organism.
If the scientist went through all the possible steps correctly in a dichotomous key and was unable to identify the insect, it means the insect might have been unknown variation or a new species.

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Which type of weather is most likely produced by a warm front? A. light to moderate precipitation B. moderate to heavy precipitation C. heavy precipitation and thunderstorms D. no precipitation

Answers

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In mammals, air enters lungs through tubes called _____, which branch into smaller tubules called _____, which extend out to tiny air sacs called _____.

Answers

In mammals, air enters lungs through tubes called _____, which branch into smaller tubules called _____, which extend out to tiny air sacs called _____.
trachea; bronchioles; spongy tissue
>> bronchi; bronchioles; alveoli
bronchi; alveoli; gills

Answer:

In mammals, air enters lungs through tubes called bronchi, which branch into smaller tubules called bronchioles, which extend out to tiny air sacs called alveoli.

What do the polar bears, reindeer, and shrubs that live in a single area make up?

Answers

they make up an ecosystem (living and non living things in an environment)

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A 21-year-old female was lost in the woods for several hours. The ambient temperature is 25 degrees Fahrenheit. She is lethargic and confused. The skin on her hands is waxy and white. What should you do

Answers

The female should be gently wrapped with dry blankets due to exposure of temperature of about 25 degrees Fahrenheit.

Explanation:

Prolonged exposure to extreme heat or cold conditions can impair the body’s temperature control system.

In the above case the patient is exposed to extreme cold condition in a wood with a freezing temperature of 25 degrees Fahrenheit (-3 degrees Celsius) which leads to hypothermia and frostbite.

Extreme cold conditions can freeze the tissue layers of the parts of the skin exposed like those of the face, hands and feet especially. Due to this the skin becomes white (even grayish yellow or blue) and waxy, cold and numb, and the outer surface may become hard and blistered. There will also be extreme pain, stinging and tingling sensation in the exposed areas.

These changes are mainly due to impaired blood circulation and hypothermia. Hypothermia which is lowering of body temperature causes confusion and lethargy.

The first-aid given for frostbite primarily includes warming the body. The affected person’s body should be covered with warm and dry blankets gently and loosely and any wet clothes should be removed.

So when the body is warmed, the body temperature also will increase and correct the hypothermic symptoms like lethargy and confusion.

Which best describes why acetic acid (CH3COOH) is an organic compound, but sodium hydroxide (NaOH) is not?

Answers

CH3COOH is considered an organic compound since it contains a chain of carbon. An organic compound is a class of organic compound that contains one or more carbon atom covalently linked to other elements. Inorganic compounds, on the other hand, is a compound that doesn't necessarily have a carbon atom.

Answer:

C. Acetic acid contains a significant amount of carbon, but a sodium hydroxide contains no carbon.

Explanation:

Organic compounds are based on carbon. They also, almost always, include hydrogen as well.

Correct on the Edge exam.

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