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scZoUnD [109]
4 years ago
6

Ancient cyanobacteria released ______, which assisted in creating the atmosphere as we know it today.

Biology
1 answer:
vladimir1956 [14]4 years ago
6 0
Ancient cyanobacteria released oxygen, <span>which assisted in creating the atmosphere as we know it today. The correct option among all the options that are given in the question is the fourth option or option "D". I hope that the answer has actually come to your great help.</span>
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Which event in meiosis accounts for Mendel's principle of segregation?
balu736 [363]

Answer:

c. separation of homologs at anaphase I

Explanation:

Law of Segregation is also popularly known as purity of gamete. Law of Segregation is proposed by Mendel’s which stands universal law till date. The law states that allele (alternative form of same gene) pairs separate or segregate at the time of gamete formation.

The gametes form by meiosis or reductional division so, each gamete receives only one allele of trait.  

During metaphase I of meiosis the homologous chromososmes gets arranged on the central plate and get attached to the spindle fibres and then anaphase I begins with the separation of each chromosome of the homologue. Each chromosome of a pair moves to opposite poles.  

7 0
3 years ago
What is the function of circuit breakers and fuses?​
Andru [333]

Answer:

Fuses and Circuit Breakers both serve the same purpose – which is to protect electrical circuits by preventing overloads that can cause fires. They both interrupt the flow of electricity, but in very different ways from each other. While a fuse is made of a piece of metal that melts when overheated, circuit breakers on the other hand, have internal switch mechanisms that can be tripped by an unsafe surge of electricity.

Fuses can be quicker for interrupting the flow of power, but when they melt they must be replaced; circuit breakers on the other hand just need to be reset. When comparing the two, we’ll take a look at some of the major advantages and disadvantages between fuses and circuit breakers to distinguish between them.

8 0
3 years ago
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In a nuclear fusion reaction, the mass of the products is less than the mass of the reactants. What happens to this "missing mas
lesya [120]
<span>In a nuclear fusion reaction, the mass of the products is less than the mass of the reactants. This "missing mass" -turns into energy.</span>
6 0
3 years ago
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A superior ovary has
UNO [17]

Answer: a. sepals, petals and stamen attached below it

   

Explanation:

A superior ovary is the characteristic feature of the hypogynous flower. In this type of flower all the petals, sepals and stamen are remained attached to the receptacle that lies below the ovary also called as the gynoecium of the flower. All the floral parts grow underneath the ovary from the site where the carpel of the flower actually arises.        

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3 years ago
A biologist wants to use a radioactive isotope of nitrogen to radiolabel certain molecules in a culture of cells she is growing.
RideAnS [48]

Answer:

D) proteins

Explanation:

The N-15 is one of the isotopes used in proteomics, in which the full set of proteins expressed by a genome are studied. The method is called Stable Isotope Labeling by/with Amino acids in Cell culture (SILAC) in which the labeled amino acids are used to estimate the protein levels. With this method, the diseases biomarkers can be identified and studied.

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