Why do scientists believe that the earliest life forms most likely lived in the oceans? chemicals could not react to form complex molecules without water. early earth did not have an ozone layer. the land would have been too cold for life to form there first. all life relies on water.

An experiment is designed to test the relationship between the initial height of a basketball before it is dropped to the height of its rebound bounce. the height of the rebound bounce is measured using a scale positioned behind the ball. in the above experiment, which condition would not be controlled? a). the starting height of the ballb). the surface the ball bounces on c). the type of ball d). the method to measure the rebound height of the ball

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

Being able to see a square in the middle of the image despite not having lines to form a square represents the gestalt principle of a. proximity b. similarity c. closure d. continuity