What is the difference between xylem and phloem?

You isolate cells from a tumor and study them. You observe that the cells continue dividing, even when DNA is damaged, when the cells become crowded, or even when nutrients run low. These observations lead you to suspect that the cells

Which of the following has a positive effect by acting as an artificial reef in some areas? a. undersea cables b. fisheries management zones c. wind turbines d. unexploded ordnances

Carbon is a major component of all organic compounds, including carbohydrates, lipids, proteins, and nucleic acids. carbon dioxide is continually exchanged between the atmosphere and oceans.

Describe three human activities that threaten aquatic habitats?

How would someone measure the effect of pH on the rate ofenzyme reaction?

Which cause contributed to both world war 1 and world war 2 (A) Competition For Increased Economic Power (B) Some Nations' Desire To Expand Territory (C) The Belief In A Superior Race (D) A Mission To Spread The Catholic Faith

Ali was conditioned to blink using an air puff and a tone. the experimenter then presented only the tone until the blink response disappeared. what is ali displaying?

How does the reproduction rate of bacteria affect the illmness that is cuased by it?

Kristyn is thrilled to hear she is expecting twins. her doctor informs her that the twins are dizygotic. what does this mean?

Chromosome duplication, which happens during mitosis, occurs in the what?