What is the difference between xylem and phloem?

Which is an example of a way in which science has improved a societal problem A. Contaminated water being purified B. Pathogens becoming resistant to antibiotics C. bacteria contaminating food D. Unknown diseases in some areas

Laws and theories are essentially the same thing; laws are just better tested than theories. True False

In what ways are the archaebacteria different than the eubacteria?

Which best describes the physical and chemical digestion

Describe the role of producers in a food web. Are producers the basis of all food webs? Justify your answer.

When dust and ash particles from a volcanic eruption block out sunlight and reduce solar radiation, earth experiences the. This results in temporary climate cooling

Which of Jupiter's moons is volcanically active? Io Ganymede Europa Callisto

Risk assessment depends on

DNA is genetic material that makes up living things, and folic acid plays an important role in the formation of DNA. Jon wants to study the effect of folic acid on DNA formation in microbes.

Your alien friend from planet Xenon is visiting and wants to learn how to breed pea plants. You show your friend a recent batch of pea plants with purple flowers that you grew by crossing plants that had purple flowers with plants that had white