Which of the choices below gives a true example of how a natural resource can be renewed? a. when the wind is calm, electric fans can be turned on to make the windmills move. b. when all of the coal is gone from a mine, new coal can be grown in its place. c. when the sun is hidden behind clouds, lamps can be used to power solar cells. d. when forests have been cut down, new native trees can be planted.

How does a lytic infection differ from a lysogenic infection?

The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.