Darwin visited the Galapagos Islands while on a journey aboard the Beagle. Which observation led Darwin to start thinking about evolution?

What exactly is DNA?

Can organisms use n2 from the atmosphere

Which of these would be caused by a chemical change? A) The formation of lava. B) Sedimantary rock layering over time. Eliminate C) Metamorphic rock forming from igneous. D) Metamorphic rock eroding to form sedimentary rock.

Why is it important to alter only one variable at a time when designing and experiment?

If a negatively charged ion is more concentrated inside of a cell, is the equilibrium potential for that ion positive or negative?

The receptive surface for pollen on an angiosperm flower is the (A) anther (B) corolla (C) ovary (D) style (E) stigma

Both liquids and ___ exert a buoyant force

What is the term given to the developing infant from the eighth week after conception until birth?

Classify the following material as mineral, gem, ore, or none. some may have more than one answer. rutile

Which two combinations of alleles could produce a trait controlled by a dominant allele?