The ultimate source of energy (thanks to photosynthesis) comes in the form of
A) Carbohydrates
B) Proteins
C) Nucleic acids
D) Lipids

Fossils can only be formed when? if mud, silt or tar is in the area to preserve the fossil ierosion does not occur and allows the fossil to form oxygen and microorganisms cannot decay the bones the area is dry and does not contain mud or silt

List two modern organisms that have pentameral symmetry

The leopard frog and the pickerel frog are two closely related species. in areas where their ranges overlap, the frogs will remain separate species if they