Microscopic observations showed that during fertilization, the of eggs and sperm unite, providing evidence that genetic material .

1. Nuclei

2. is contributed equally

Explanation:

Fertilization is a process which involves the fusion of the two opposite sex gametes during sexual reproduction. The male gamete is known as the sperm while the female gamete is known as the egg.

If we look into the microscopy of the fertilization process, we will find that the process involves the fusion of gametes involves the fusion of the nuclei. This shows that it is the fusion of nuclei in important as genetic material is present in the nucleus. After the fusion, a diploid zygote is formed in which the genetic material is contributed equally by both the parents through gametes.

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.

b. heterotroph

explanation: