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Naily [24]
3 years ago
6

Precambrian cyanobacteria_____​

Biology
1 answer:
disa [49]3 years ago
7 0

Precambrian cyanobacteria produced oxygen

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Select the correct answer.
ahrayia [7]

Answer:

B

Explanation:

unusually weak magnetic fields on the sun paired with reduced solar activity cause sunspots to disappear.

4 0
3 years ago
Sex-linked traits are more common in
Maurinko [17]

Answer:

X-Chromosomes.

Explanation:

Characters determined by a gene located on only the X-chromosome are said to be sex-linked. Such traits show a different pattern of inheritance in males and females. For example, a recessive allele on the X-chromosome

• would be masked in a female if the corresponding allele on the other X-chromosome is dominant;

• would always be expressed in a male because the Y-chromosome does not have a corresponding(active) allele.

Thus, the female may posses a homozygous or heterozygous allelic pair for a sex-linked character, but a male will only have one allele for it.

8 0
3 years ago
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Which of the following could be a nucleotide of DNA? deoxyribose + phosphate group + thymine deoxyribose + phosphate group + ura
Gekata [30.6K]
Deoxyribose + phosphate group + thymine.

This is because anything with ribose is RNA and uracil is in RNA not DNA, all 3 other options have at least 1 of these in.
8 0
4 years ago
Read 2 more answers
Components of saliva include______. Multiple select question. gastrin and pepsin salivary amylase bicarbonate umami lingual lipa
Archy [21]

The components of saliva include  salivary amylase, bicarbonate  and  lingual lipase.

<h3>What is the components of saliva?</h3>

Saliva is the clear serous liquid the is secreted in the several salivary glands located at the buccal cavity of the head.

The components of saliva includes the following:

  • Salivary amylase,

  • bicarbonate  and

  • lingual lipase.

Salivary amylase and   lingual lipase are salivary enzymes that are used for the onset digestion of carbohydrate and lipids respectively. While bicarbonate is one of the electrolytes found in saliva.

Therefore, the components of saliva include salivary amylase, bicarbonate  and  lingual lipase.

Learn more about saliva here:

brainly.com/question/882651

5 0
3 years ago
In an atom, why are electrons in different places and not together?
damaskus [11]
Because the charge of electrons is opposite in sign than protons, the two types of particles attract each other, and this force, known as the Coulomb force, holds the atom together. Electrons travel around the nucleus in orbitals, but it is impossible to know both the speed and location of an electron at the same time.:) let me know if this helped
8 0
3 years ago
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