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mafiozo [28]
3 years ago
15

1. Heavily cratered regions of the moon are known as:

Biology
2 answers:
Svet_ta [14]3 years ago
7 0

Answer:

Your answer is regions

lidiya [134]3 years ago
6 0

Answer:

The answer is C

Explanation:

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An environmental change causes a decrease in the amount of oxygen that is dissolved in the pond water. Explain why this change w
sleet_krkn [62]

Answer:

during the tadpole stage, they relie on the oxygen in the water to live, unlike frogs in the adult stage who can use the oxygen in the air on land

Explanation:

4 0
3 years ago
What are the precautions that should be token when using a photometer? please help me​
Maksim231197 [3]

Answer:

PRECAUTIONS FOR USING A SPECTROPHOTOMETER :

1 . By allowing the lamps and electronics to warm up

2.By cleaning up any spills inside the cuvette compartment

3.By carrying out the set-up procedure in the correct order

4.By ensuring that %T or transmission is used as appropriate

5.By closing the door to the cuvette compartment before reading the result

6.By performing calibration checks after set up

7.By wiping fingerprints and spilt sample off the outside of the cuvette before measuring

8.By using the correct wavelength

PRECAUTIONS FOR USING A FRAME PHOTOMETER:

1. Do not move or Carry the unit when in use or connected to the mains electricity supply

2. There should be sufficient time for the chimney to cool before handling

3. Do not use acetylene with the flame photometer

4. Over adjustment of the fuel valve will cause excess flame

Do not position the product so that it is difficult to disconnect from the mains supply

5. Do not cover the chimney whilst in use.

6. Do not block or obstruct ventilation slots /airways

7. Do not operate or handle any part of the product with wet hands

I HOPE THIS WILL HELP AND IF NOT LET ME KNOW

8 0
2 years ago
Who first identified nucleic acids, and where were they discovered? Friedrich Meischer discovered nucleic acids in blood cells.
AnnyKZ [126]

Answer:

Friedrich Miescher discovered nucleic acids in blood cells.

Nuclein was discovered by Friedrich Miescher in 1869

Explanation

In the somewhat early 1880s Albert Kossel further purified the substance and discovered its highly acidic properties. Then he later discovered the nucleobases. In 1889 Richard Altman creates the term nucleic acid. Friedrich Miescher was the first scientist to ever isolate nucleic acid.

7 0
3 years ago
Read 2 more answers
eukaryotes a. are larger than prokaryotes b. have many different specialized organelles c. contains a nucleus d. all of the abov
Kryger [21]

Answer:

d.  all of the above​

Explanation:

5 0
2 years ago
What do heterotrophic cells need to survive?
Harman [31]

autotrophs, oxygen, water, minerals, and vitamins.

Hope this helps!

-Payshence

5 0
3 years ago
Read 2 more answers
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