Which enzymes do bacteria produce naturally as a defense against foreign dna injected into the bacteria by a virus?

Why do mutations in genes affect traits? o a. genes determine what type of mutagens an organism has. o b. genes produce proteins that cause traits. o c. genes affect how many chromosomes an organism has o d. genes code for carbohydrates that influence traits.

(99 points) be serious! how do farts work? how do you fart without it stinking? serious answers only

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above