Ricardo scooped up some pond water that contained many green organisms. his teacher suggested that he key out the organisms. what important feature(s) should ricardo use to determine if the organisms are plants? a) under photosynthesis b) do not live underwater c) are multicellular and undergo photosynthesis d) contain organelles that include chloroplasts

Which best explains why viruses do not have special structures or enzymes that allow them to make their own food? viruses can use energy in living cells that they infect. viruses can replicate inside a host that they infect. viruses can cause contagious illnesses in host cells. viruses integrate their rna or dna into infected cells.

Animal bodies (and even plant bodies for that matter) are complex enough that life couldn't exist without enzymes. enzymes are usually large, complex biological catalysts that are expensive to make. enzymes speed up the rate of chemical reactions without being used up during the reaction (they can be reused many times). they are highly specific in the reactions they regulate. knowing what enzymes are and how they function, why does this explain why complex life forms could not exist if there were no enzymes.

Which of these statements are true about scientific theories and hypothesis