The diagram below shows a segment of DNA with a total length of 4900 base pairs (the base letters are not shown). The arrows indicate recognition sites for two different restriction enzymes (enzyme X and enzyme Y). The numbers indicate how many base pairs in between each restriction site and/or the ends of the DNA segment. A) If the DNA was treated with restriction enzyme X ONLY, how many DNA fragments would be produced? B) What would be the length of the largest fragment?

Acar company is testing seatbelts using crash test dummies. the company finds that when cars come to a sudden stop, the crash test dummies' bodies continue to move forward. the seat belt keeps the crash test dummies from hitting the back of the seat in front of them. why do the crash test dummies' bodies continue to move forward even though the car stopped? a. the friction opposing their bodies' movement keeps them in motion. b. the inertia of their bodies keeps them in motion. c. the forward acceleration of the car keeps them in motion. d. the gravity pulling on the car keeps them in motion.

When rutherford performed his metal foil experiment, he was surprised that most of the alpha particles

Which statement is not an accurate description of meiosis? a) meiosis produces offspring that are genetically diverse. b) meiosis produces offspring that are identical to the parent. c) in sexual reproduction half of the genetic material comes from the father (sperm) and half of the genetic material comes from the mother (egg). d) meiosis decreases the number of chromosomes by half so that when a sperm fertilizes an egg, the resulting zygote has the correct number of chromosomes.