1. Nitrogen from the atmosphere must be converted into what molecule? What organisms add this molecule to the soil?

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

During which phase does earth see more than half of the moon's surface? 1)first quarter2)third quarter3)waxing gibbous4)waning crescent

Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .