Which characteristics used to classify galaxies

Which 3 scientists directly contributed evidence for the cell theory

The movement of substances through the cell membrane without the use of cellular energy

Phosphorous and other chemicals are mined from Earth's crust in order to manufacture products. Phosphorous is used to produce fertilizers. When it rains over farmland, the excess fertilizers enter runoff.

Information about inherited traits is stored in what

A cell begins the cell cycle with 20 chromosomes at the end of the cell cycle the result will be what?

Which fossil would look most like an ancient organism? * trace cast mold?

Hydrogen is in column 1 of the periodic table What information does this give us? There is one other element that hydrogen will bond with There is one neutron in the nucleus.

Most plant must draw resources from two very different environments. Explain this statement?

When is facilitated diffusion necessary? a. When the molecules are too large. b. When the molecules are insoluble. c. When the direction of movement is opposite to natural diffusion. d. none of the above

G1, S, and G2 are all phases of which part of the cell cycle? a. interphase b. anaphase c. prophase d. telophase