What is the nitrogen base pairing rule for dna

What type of specimens where you able to see under each of the microscopes in the microscope activity

The distribution of related animals and plants across the world

Which is a genetic engineering advancement directly related to a career in biotechnology? 1) improving solar energy collection 2) transporting textiles at higher rates 3)creating crop foods that resist insect pests 4)repairing historical sites with quality materials