determine the ionic characteristics of this element. oxygen

electrons can donate 0, 1, 2, -1, -2, or +2
electrons can receive 0, 1, 2, -1, -2, or +2
valence (incl. + or -) 0, 1, 2, -1, -2, or +2

Anne, an intern in a microbiology lab, was observing the characteristics of various specimens of protists. match each specimen to the category of protist to which it belongs.

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.

Compare and contrast your sells take in oxygen, water, and food. what is one waste product that leaves your cells?