Which is not a factor in a fossil organism being useful as an index fossil?

Which geologic principle explains why the bottom stratum in a section of rock is the oldest?

if an earthworm eats enough matter that it consumes 100 grams of nitrogen in its lifespan, how much nitrogen did it release into the soil

Which is an ingredient that would normally be found in a PCR reaction mix? DNA ligase DNA nucleotides DNA primers DNA polymerase

Why are only shallow earthquakes abundant near the ocean ridges?

Which has prokaryotic cells A. Onion root B. Cow's liver C. Human blood D. E. coli Sorry for asking a lot of questions; )

Which class of immunoglobulins sensitizes cells to allergens?

Which statement about somatic mutations is true? A. They exist in all the cells of the body. B. They are acquired through exposure to mutagens. C. They are inherited via sperm and egg cells. D. They are passed on to offspring.

In year three the farmer discontinue the use of the insecticide Which statement would best predict the population in generation 4

What happens to carbon atoms during cellular respiration or fermentation?

How are photosynthesis and chemosynthesis similar?