Why are there more genotypes than phenotypes for bloodtypes

After hydrogen and oxygen, witch element makes up almost all of the most common substance in your body

Aphids are tiny insects that feed on plants. ladybugs are to plants because they eat aphids. which type of organism are aphids in this scenario? co decomposers predators prey producers

Sea stars, sea urchins, sand dollars, and brittle stars are all memeber of a group, what is the common name of the group they are all in