Some dinosaurs may have had feathers. The femur is the thigh bone - the long bone in the upper part of the leg between the hip and the knee. A fenestra is a natural hole or opening in a bone. The skull has many fenestra. FERN Ferns are non-flowering plants that were plentiful during the Mesozoic Era and usually live in warm, moist areas.
Ferns have fronds divided into leaflets.
Fertilizers include manure, compost, and chemical mixtures. The fibula is the calf bone - the bone in the lower, back part of the leg between the knee and the ankle. For example, the green iguana is a folivore. These are eaten by other carnivores. This layer is teeming with animal life, especially insects.