An ecosystem is self-sustaining as long as organ - isms have sufficient quantities of energy, oxygen, minerals, and water. when organisms die, some of these materials are recycled back to plants in the ecosystem primarily through the activity

What coefficient must be placed in front the of water molecule to balance the equation? ch4 2o2 → co2 __h2o why?

Which best defines cohesion? A: Cohesion is caused by polar water molecules attracting each other. B: Cohesion is caused by polar water molecules repelling each other.

Which structure holds the genetic information (DNA) for the cell?

Write a short essay that discusses how the structure of amino acids allows this one type of polymer to perform so many functions.

Stored food in plants is eaten by animals for energy. true false

Earthworms like the one scene here 11 saw your bunny wondered how changes in the moisture content of the Soil would affect the movement of the worms he want to design an experiment to test his idea what would be Benny's manipulative variable in this

Organizational members tend to experience metamorphosis before they experience the encounter stage of assimilation. Group of answer choices True False

Which are deuterostomes? A. Humans B. Slime molds C. Fungi D. Flowering plants

Because of the Doppler effect, sounds coming from a moving source Question 6 options: A seem louder than if the source were not moving. B are of a higher frequency if the source is moving away from the observer.

Which of the following is a need of most plants? A. To release water through their leaves. B. To take up oxygen from the environment. C. To capture sunlight to perform photosynthesis. D. To release carbon dioxide to the environment.