How/where was CRISPR initially discovered? A. It is part of a bacteria's immune system.
B. It helps recognize invading viruses and cuts up their DNA.
C. It was made in the lab by scientists at Stanford University.
D. It's found naturally in viruses.
E. It helps them to invade bacteria and destroy their DNA

Which of these is a major trend in land plant evolution? a) the trend toward smaller size b) the trend toward a gametophyte-dominated life cycle c) the trend toward a sporophyte-dominated life cycle d) the trend toward larger gametophytes

Darrel conducted an experiment with the following procedure: fill two cups with ice water. place an uninflated balloon snuggly onto your left index finger. blow a little air into an identical balloon, and place it onto your right index finger. place both fingers into the cups of ice water. darrel noticed that his right finger felt warmer in the ice water than did his left finger. which of the following does the experiment show? a. air is a good radiator of heat. b. air is a good insulator of heat. c. air is a good conductor of heat. d. air is a good convector of heat.

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?