Which statement best describes Protists

Cedure,© data: rmativetable 1: positive and negative results when imacromoleculeregative results when testing for the presence of macromoleculeschemical test | positive test result negative tcarbohydrates – simplesugarse negizitivecarbohydrates – 2: results for the presence of macromolecules in the evidence sample

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

What happens when a magniseum ion ia atracked to a chlrene ion