Which of these is an example of physical weathering? A. iron in igneous rock rusting B. plant roots splitting rock C. students tearing paper D. acid rain breaking down rock

Molars and premolars of early archaic homo sapiens are reduced in size, while in some populations, front teeth may be increased in size. how do anthropologists explain this observation

What is the most significant role of homologous recombination in eukaryotes that is not found in prokaryotes? exchange of genetic information between parental chromosomes DNA repair gene conversion generation of heteroduplex DNA

O2 and CO2 can cross a lipid bilayer using what transport method?

Microbial life on Earth predates intelligent life like us by at least 3-4 billion years. Do you think this fact tells us anything about the likelihood of finding intelligent life, as opposed to finding any life, on extrasolar planets? Explain.

What is the largest source of water pollution in the United States?

How long do footprints last at the sene of the crime?

Which of the following items would have the highest density? A. A 2 cm3 block of lead with a mass of 11 grams B. A 12 cm3 block of wood with a mass of 3 grams C. A 12 cm3 block of aluminum with a mass of 2 grams

Why are the nerves that take information from our world called sensory neurons?

Explain the effects of radiation on the cellular process of mitosis and meiosis

A biome that has a large amount of rainfall, high temperatures, and a poor soil is a