Which two types of biotechnology share a common goal of producing future generations of a population that share a particular desired trait? A. DNA Fingerprinting and gene cloning

B. bioremediation and reproductive cloning

C. Selective breeding and genetic engineering

D. gene therapy and yeast fermentation

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.

Pulmonary arteries carry highly oxygenated blood. true or false?