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Tema [17]
3 years ago
9

Which was least likely to have been a component of Earth’s atmosphere before life began?A-sulfurB-carbon dioxideC-oxygenD-water

vapor
Biology
1 answer:
Burka [1]3 years ago
8 0

The correct answer is Oxygen.

The surface of the Earth was liquefied. As the Earth cooled, an atmosphere generated primarily from gases erupted from volcanoes. It constituted methane, hydrogen sulfide, and ten to 200 times as much as carbon dioxide in comparison to today's atmosphere.

It was considered that there was an extreme volcanic activity for the initial billion years of the existence of the Earth. The initial atmosphere was possibly majority carbon dioxide will no or little concentration of oxygen. There were slight quantities of ammonia, water vapor, and methane.

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An organism’s traits are determined by the specific combination of inherited _____.
goldfiish [28.3K]

Answer:

Genes.

Explanation:

Genes are present on DNA that are inherited from parents to their offspring. Genes may be defined as the segment of DNA that ultimately form a particular protein product.

The particular trait of an organism is determined by the specific combination of the inherited genes. The genes are nearly same in all the human beings and there mutation can cause observable phenotype traits.

Thus, the correct answer is option (2).

3 0
3 years ago
What is an advantage of a wind energy?
Karolina [17]
The answer is to this question is A
8 0
2 years ago
A man is brachydactylous (very short fingers; rare autosomal dominant), and his wife is not. Both can taste the chemical phenylt
netineya [11]

Answer:

The correct answer is -

A) BbTt x bbTt

B) .5^4 or 1/16 or 0.0625

Explanation:

As it is given that Brachydactylus and PTC tasters both traits are autosomal dominant conditions which mean only one allele would be enough.

For Branchydactylus and For tasting :  man and women will be heterogeneous.

Hence,

The Genotype of man = BbTt

The Genotype of wife = bbTt

b. Answer = 0.0625

For Branchydactylus:

Bb X bb

Possible genotypes:

B b

b Bb( Brachydactylus) bb(normal)

b Bb (Brachydactylus) bb (normal)

The probability of a single child being Branchydactylus = 2/4 = 0.5

So,  Probability of all 4 child being Branchydactylus = .5 x .5 x .5 x .5 = 0.0625

3 0
3 years ago
I don’t understand- lol
qwelly [4]

Answer:

B

Explanation:

Increasing greenhouse gases would lead to an increase in the average global temperature throughout this century.

4 0
3 years ago
In this example, research in the fields of __________ and __________ are being hindered in the United States.
solniwko [45]

Answer:

............................

Explanation:

...............

4 0
3 years ago
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