A. 3. Which of the following correctly explains how atmospheric nitrogen is converted to nitrogen
compounds used by living organisms?
Sunlight converts atmospheric nitrogen to a form usable by protists.
b. Plant leaves convert atmospheric nitrogen to a form usable by animals.
Bacteria in soil convert atmospheric nitrogen to a form usable by plants.
d. Invertebrate animals in soil convert atmospheric nitrogen to a form usable by fungi.
C.

Acladogram is a branching diagram that represents suggested evolutionary relationships among organisms based on the presence of unique traits. a scientist discovers a new organism that lacks limbs and does not have a true backbone. the organism lays eggs to produce offspring and has a cartilage-like rod known as a notochord running along its dorsal surface. on the cladogram below, select the species to which the newly discovered organism is most closely related.

In sexual reproducing animals once fertilization of the egg takes place, the exists as a single cell until cell division begins. a) egg b) larva c) sperm d) zygote

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm