Krista is playing tennis at the park. when the tennis ball flies toward her, krista hits the ball with her racket, which causes the ball to fly in the opposite direction.
according to newton's third law of motion, which of the following is true?
hello! good morning!
first of all, you need to know what a genotype is. a genotype is the genetic constitution of an individual organism. which means, aa, can not be a genotype.
hope this ! have a great day sir/ma'am.
all the options are correct.
1. new ways to preserve and transport blood for blood transfusions were discovered.
2. blood transfusion safety was improved.
3. scientists discovered that elements of blood could be separated by centrifuge.
4. scientists discovered that plasma could be preserved by freezing.
karl landsteiner was the man who discovered some of the human blood types in 1900 and 1901 at the university of vienna.