Energy in this ecosystem passes directly from the sun to

A. Herbivores
B. consumers
C. heterotrophs
D. Autotrophs

Which characteristics are typical of a human population in the postindustrial stage?

Which one is an advantage of external fertilization a. the offspring are genetically identical to the parents b. more eggs can be fertilzed at one time c. more sperm can be released at one time d. more protection is available for developing plz

The term autotroph refers to an organism that: a. uses co2 for its carbon source. b. must obtain organic compounds for its carbon needs. c. gets energy from sunlight. d. gets energy by oxidizing chemical compounds. e. does not need a carbon source