Why is magnetism an example of a non-contact force? 1)Magnetic fields can push or pull objects.

2)Magnets can hold materials in place.

3)Magnetic fields are created by moving electrons.

4)Electrical fields can be attractive or repulsive.

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

Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.

Name the organism that belongs to the kingdom protista.