Which statement best explains the genetic variation that results from sexual reproduction? A. Offspring recieve a mix of genes from two different parents.
B. Each chromosome contains many copies of the same gene.
C. Offspring recieve genes that are exactly the same as one parent's genes.
D. Each chromosomes contains many different genes.

Two particles of masses m and 2m are placed on a smooth horizontal table. a string, which joins these two masses, hangs over the edge supporting a pulley, which suspends a particle of mass 3m.the pulley has negligible mass. the two parts of the string on the table are parallel and perpendicular to the edge of the table. the hanging parts of the string are vertical. find the acceleration of the particle of mass 3m.

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up