What is the relationship between DNA, a gene, and a chromosome? A. A chromosome contains hundreds of genes, which are composed of DNA

B. A chromosome contains hundreds of genes, which are composed of protein

C. A gene contains hundreds of chromosomes, which are composed of protein

D. A gene contains hundreds of chromosomes, which are composed of DNA​

Plz fast biotechnology is a growing field of applied biology. many crops such as corn have been engineered to be resistant to herbicides. therefore farmers can spray these chemicals to kill weeds growing near the crop without worries of killing the crop itself how does this type of biotechnology work? a. by changing the genetic make up of the crops. b. by causing the crops to kill the weeds. c. by changing the type of crops used. d. by changing the location of the crops.

Acell in the human nervous system whose primary function is to form myelin and the blood-brain barrier, respond to injury, remove debris, and enhance learning and memory is called a(n) cell.

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins