1. Which is the correct sequence from simplest to complex levels of biological
organization?
a. Cell-tissue-organs-organsystem-biosphere-population-community ecosystem-
organism
b. Cell-tissue-organs-organsystem-organism-community-ecosystem-population-
biosphere
C. Cell-tissue-organs-organsystem-organism-population-community ecosystem-
biosphere
d. Cell-tissue-organs-organsystem-organism-community-population-ecosystem-
biosphere​