The most productive soils contain A) pesticides. B) fresh water. C) a large supply of producers. D) decomposers to recycle organic matter.

When a sound wave moves through the air, it causes air particles to vibrate. There are two parts to the tiny movements that result in vibration. During the first part, air particles move closer together as they move into regions of compression.

Runoff that contains fertilizers can cause increased levels of nitrogen in the ocean. What is a possible result of these increased nitrogen levels that may have harmful effects that can disrupt the diversity of ocean ecosystems?

The lower mantle has an average density of 5.5 grams per cubic centimeter. Which of the following could be the density of the outer core? A. 3.5 grams per cubic centimeter B. 5.5 grams per cubic centimeter C. 10.0 grams per cubic centimeter

What would be the immediate consequence if all of the glyceraldehyde 3-phosphate made during the carbon fixation and reduction phases of the calvin cycle were used to make glucose?

What structures in amoeba and paramecium also occur in plant cells?

What is a variable? A. A statement that explains a phenomena and can be tested. B. An educated guess used in an experiment. C. Something that must be kept constant in an experiment. D. A value or characteristic that can take different values.

Events that damage the cell's regulatory apparatus, trapping it in the G1 phase of the cell cycle, cause the uncontrolled division of cells called

What is incomplete dominace or codominance and its cause?

What is the functioning of cell membrane?

Why is the grass green and the sky blue?