Which characteristic of a population is calculated by the number of organisms divided by the area they occupy? A.
age structure

B.
density

C.
distribution

D.
genetic diversity

Which ideas did your answer contain? check all that apply. no food for organisms no oxygen in the atmosphere no trees or flowering plants no products based on trees or plants (building materials, medicines, fuels, fibers) no fossil fuels

20 the main source of energy for our planet comes from the

Prokaryotic and eukaryotic cells are different in many ways other than the presence or absence of a nucleus. if both archaebacteria and eubacteria are prokaryotic cells, then why are archaebacteria more closely related to eukaryotic cells than they are to eubacteria?