Andy's teacher asked him to come up to the front of the class to demonstrate work. which of the following could andy do in the classroom to demonstrate work? a. andy pushes a desk across the floor. b. andy sits in his chair, doing nothing. c. andy pushes against a desk, and it doesn't move. d. andy holds a book.

Andy pushes a desk across the floor.

Explanation:

An example of work in the classroom would be if Andy pushes a desk across the floor.

Work is done by transferring energy to an object (from Andy to the desk) by applying a force (the push), which makes the object move in the direction of the force.

If Andy sits in his chair, or holds his book, he is not applying a force that moves any object. Also, if Andy pushes his desk, but it doesn't move, work is not being done (since the object must move for work to be done).

d. in sexual reproduction, offspring have more chromosomes than

either parent.

asexual reproduction results in offspring which are genetically the same as the parent organism (not counting a rare mutation). sexual reproduction produces a random mixture of the genetics derived from both parents

explanation: