During sexual reproduction the chromosomes of 1. Two separate individuals are combined together
2. One individual are transferred to another
3. One parent only are copied for its offspring
4. Two separate individuals are spilt apart

What is thought to have caused the mass extinction at the end of the cretaceous period?

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

Can someone i have no idea of how to do this.