How do scientists control the spread of disease?

The incidence of down's syndrome increases with the age of the mother. a. True b. False

Light touch and gravity are all examples of different environmental

What do the roots not provide for the plant? water food nutrients anchor into soil

Which scientist determined that the fundamental unit of DNA was a nucleotide containing one of four possible bases, a sugar molecule, and a phosphate group? Franklin Watson and Crick Levene Chargaff

What are two types of membrane diffusion? Describe the enzymes that promote membrane diffusion.

What is a tough and rigid layer that surrounds plant cells as well as some algal bacterial cells

Which of the following statements about natural selection is TRUE? A. Natural selection results in those individuals within a population who are best-adapted surviving and producing more offspring. The traits that promote survival are heritable. B.

Explain how temperature and salinity affect the formation of deep currents.

What substance is added during hydrolysis in order to break down food macromolecules?

What would happen if grasses and shrubs were removed from an ecosystem? A. the primary consumers would increase B. the primary consumers would become secondary consumers C. the primary consumers would die out or move elsewhere D.