1 Which of the following levels of organization are in order from least complex to most complex?
A Organ system = organ = cell molecule
B Molecule cell = organ = organ system
C Cell = molecule = organ system = organ
D Organ = organ system = molecule = cell

Which best compares habitat and niche? o niche is a place in which organisms live, and habitat is the way in which an organism fits into its habitat.o habitat is a place in which organisms live, and niche is the way in which an organism fits into its habitat.habitat is a group of organisms that live in an area, and niche is a specific species that lives in that areao niche is a group of organisms that live in an area, and habitat is a specific species that lives in that area.

According to the cladogram, which organisms have roundworms as a common ancestor?

Which best describes the nucleus of an atom a. it is where all of the particle s of the atom are located b. it is the negatively charged part of the atom c. it is where the electrons and the protons are located d. it is the part of the atom with the greatest mass