In the nutrient cycle bacteria that live on the roots of plants a. break down nitrogen compounds into nitrogen gas b. denitrify nitrogen compounds c. change nitrogen gas into plant proteins d. change nitrogen gas into ammonia

In sexual reproducing animals once fertilization of the egg takes place, the exists as a single cell until cell division begins. a) egg b) larva c) sperm d) zygote

Based on the law of dominance, we would expect percent of the offspring from this cross to have large teeth.

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils