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Harlamova29_29 [7]
3 years ago
9

The theory that ontogeny recapitulates phylogeny was originally offered by?

Biology
1 answer:
Over [174]3 years ago
7 0
Ernst Haeckel            hope it helps!
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Do organisms with an exoskeleton have to molt to grow bigger
Angelina_Jolie [31]
Yes just like a snake the shed their skin to grow like a outer shell
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Many naturally occurring environmental exposures increase risk for cancer. Residents in many parts of North America are exposed
Katena32 [7]

Answer:

RADON GAS

Explanation:

Radon is a naturally occurring gas, which is produced due to the radioactive decay of the Radium element. It is one of the dense gas that is mostly concentrated in the lower portion of the houses, and are trapped in the cracks and fractures of the walls of houses and buildings.

Radon gas is an invisible, colorless and odorless gas, which is a very harmful gas, and exposure to Radon gas can cause an individual to suffer from cancer.

In recent studies, it has been found that in many parts of North America, a large number of residents are exposed to Radon gas, which led to an increased risk of cancer.

7 0
3 years ago
18. Which of the following animals could detect sound at a frequency of 67,000 Hz? A. Tree frog B. Elephant C. Bat D. Dog
Doss [256]
The animal that can hear 67,000 hertz is a dog !!
3 0
3 years ago
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Why is HCl poured on the DNase test agar plates that you inoculated last period?
tia_tia [17]

Answer:

A. To cause intact DNA to precipitate, so the activity of DNase can be determined.

Explanation:

The presence of DNase is special feature for some species of bacteria and can be used for identifying them. During DNase test, diluted hydrochloric acid (HCl) can be poured onto the agar plates so that there will be a clear zone close to the bacteria colonies. Each nucleotides are soluble in diluted HCl. But DNA is not soluble in the diluted HCl, thereby making the DNA to precipitate in the rest of the plate.

4 0
3 years ago
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Control (treatment or procedure in an experiment that provides results to which all others are compared):
vichka [17]
Hello.

The control group is the group that gets no specal treatment.

If your askiing if that statment is true it is.

Have a nice day
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3 years ago
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