According to the scientific definition, which is not an example of work?
a.
pushing a tack into a block of cork
b.
pulling a nail out of a piece of wood
c.
brushing teeth
d.
leaning against a large cargo crate

Crossing over is a method of (blank)?

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing

If a cell is placed into a hypertonic environment, what will happen to it ? a)it will shrink or shrivel b)nothing c)it will burst d) it will expand or enlarge