Answer:
The correct option is : b. centrosome 
Explanation:
Centrosome is a cell organelle, which acts as the microbule organizing center and also regulates the cell cycle progression in an eukaryotic cell. 
During the prophase stage of the cell cycle, the centrosomes are associated with the membrane of the nucleus. The nuclear membrane ruptures during the mitosis and the interaction of the centrosome nucleated microtubules with the chromosomes leads to the formation of the mitotic spindle.
<u>Therefore, mitotic spindles arise from the centrosome.</u>
 
        
             
        
        
        
Answer:
<em>Staphylococcus aureus</em>
Explanation:
According to the rule of binomial nomenclature, the name of the organism is written in two parts that are-
1. Generic name- The first name which signifies the genus of the organism, the word represents the noun of the organism, the first letter of the word is always uppercase that is like in the "Staphylococcus"
2. The specific epithet-the second name of the organism represents the species which is usually a noun, and the first letter of species is always written in lowercase like in the aureus.
The scientific name should be written either in the italicised form or if not possible to write in the italicised form than underline the name.
Thus, <em>Staphylococcus aureus </em>is correct.
 
 
        
             
        
        
        
Answer:
i believe the answer is c
Explanation:
 
        
             
        
        
        
There are only three that i know that are consumers:
primary
secondary
tertiary
i think the other one your looking for is producer but that is not considered a consumer..
Hope this helps
        
             
        
        
        
E)none of the above because guanine doesn't change, only thymine into uracil.