External fertilization is the correct answer.
        
                    
             
        
        
        
Answer: Complete dominance
Explanation: complete dominance occur when a dominant allele in heterozygous form completely mask the effect of the recessive allele.
For example a situation where Tt having two allele and allele T for tallness is dominant over t for shortness making the plant phenotype a Tall plant. This is called complete dominance.
A condition when the heterozygous allele do not completely expressed itself over the recessive allele is called Incomplete dominance.
For the plant to have a pigmented color in an heterozygous form the allen M for pigment is completely dominant over allele m for albino.
 
        
             
        
        
        
Answer:
<u>Proto-oncogenes</u>
- These genes code for protein that normally promote cell division
- Mutations that increase activity of these genes may lead to cancer
<u>Tumor suppressor genes</u>
- These genes code for protein that normally prevent uncontrolled cell division
- Some products of these genes normally function in repairing damaged DNA
- Mutation that decrease activity of these genes may lead to cancer.
Explanation:
<em>Proto-oncogenes</em> are group of genes that ordinarily help cells develop. At the point when a proto-oncogene mutates or there are such a large number of duplicates of it, it turns into a "terrible" quality that can turn out to be forever turned on or activated when it shouldn't be. At the point when this occurs, the cell becomes wild, which can prompt malignant growth. This terrible quality is called an oncogene.
Tumor suppressor genes are normal gene that hinder cell division, fix DNA missteps, or tell cell when to undergo apoptosis (die). At the point when tumor suppressor gene don't work appropriately or inactivated, cells can develop uncontrollable growth, that ultimately lead to cancer.
 
        
             
        
        
        
Answer:
A.All involve the active transport of gases across membrane