What are substances and materials that compose earth's interior

Describe a lithostratigraphic unit.

What occurs when two or more organisms and population in a community rely or need similar resources

Cells placed in an isotonic solution would

U 21 | 22 25 What is the most likely reason that horses and mountain goats have hooves? They have homologous structures because they have a common ancestor They have analogous structures because they have a common ancestor.

Matter and energy in the web of life

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