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3 years ago

How does the gasses in earths air differ from place to place

2 answers:

7 0

Gasses on and in the earth differ places to places because-
1. depends on their weight and mass, looking at how many no. of protons, neutrons and electrons are there.
ex. oxygen is less in mountainous area because they are heavier than other gases.
2. depends on the what extra things the atom needs to be stable, like 4 more electrons or any more.
3. depends on their radioactivity and electromagnetic waves....
PS: dont write the last one not really sure abt that

lara [203]3 years ago

5 0

As molten rocks cool gases such as nitrogen water vapor and carbon dioxide are released

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Which animal undergoes external fertilization?

zhannawk [14.2K]

Answer:

Among vertebrates, external fertilization is most common in amphibians and fish. Invertebrates utilizing external fertilization are mostly benthic, sessile, or both, including animals such as coral, sea anemones, and tube-dwelling polychaetes. Benthic marine plants also use external fertilization to reproduce.

= Fish

Explanation:

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3 years ago

DNA samples should be stored in an airtight containers to prevent contamination true or false

Aleksandr-060686 [28]

Answer: True

Explanation:

DNA is a biological evidence. It is a heredity material which is present in all organisms on earth. The DNA in humans can be taken as sample from nails, bones, blood, skin, hair and other sources.

The DNA samples can be taken so as to establish the identity of the culprit, victim or any one which is associated with crime.

The DNA evidence has applicability as a potent evidence in the court of law. Thus utmost care should be taken to preserve it's integrity until it is analysed and presented in the court of law.

Thus the DNA evidence should be collected and preserved in airtight containers so as to prevent the entry of airborne pathogens like bacteria, virus these can contaminate the sample evidence and can make the evidence not of any use.

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3 years ago

The term respiration describes the exchange of gases between your blood and the air. Cellular respiration ________.

kotegsom [21]

Answer:

The term describes cellular respiration

Explanation:

Cellular respiration, also known as internal or tissue respiration can be represented by the equation:

C6H12O6 + 6H2O ---> 6H2O + 6CO2 + Energy (in form of ATP)

From the equation, glucose from the blood is oxidized by oxygen trapped from the air by the nostrils. The main purpose of cellular respiration is to generate energy required by the body for various life activities

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3 years ago

In second marriages, couples are older and tend to be _________.

stealth61 [152]

Answer:

correct option is a. more realistic

Explanation:

we know that marriage is legally relationship between a husband and a wife

and some for of marriage are

1 Arranged marriage

2 Civil marriage

3 Common law marriage

4 Boston marriage

5 Berdache marriage

and in second marriage

age and experience will be more

so as they age, they have gained experience from their past life

so we can say that in second marriages old couples tend to be more realistic

so correct option is a. more realistic

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3 years ago

Which group contains only prokaryotes?

olchik [2.2K]

Answer:

Domains Archaea and Bacteria

Explanation:

4 0

3 years ago

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