Which of the following provide chemical evidence of ice ages? A. variations in pH levels in fossils B. concentrations of compounds in rock C. variations in ratios of isotopes in fossils D. concentrations of compounds in old trees

Which statements accurately describe the Doppler effect? Select three options.

Can someone explain primary succession and secondary succession to me?

In sexually reproducing organisms, mutations can be passed on to the organism's offspring if the mutation occurs in what

What are the multi-branching extensions on the periphery of a neuron primarily responsible for receiving information?

What is homeostasis and why is it essential for living things?

Which biome receives 200 to 400 cm of rain per year? A) deciduous forest B) temperate rain forest C) taiga D) grassland

Which of the following statements violates the cell theory? A) Mitosis produces new cells identical to the parent cell that divided to make them. B) Viruses are not considered to be living organisms, because they are smaller than a cell.

One scientist discovered a new theory on the evolution of the universe. What is the next step for the scientist to take?

Darwin and the theory of evolution a. True b. False worksheet

The cross-section, or diameter, of the hair shaft is much larger in coarse hair than in which of the following? A. Fine hair B. Gray hair C. Curly hair D. Blonde hair