The answer to your question A link between green algae and land plants has been clear to biologists for. The remainder of Chlorophyta constitutes a monophyletic group. This major bifurcation in green plant evolution implies a single common ancestor to the two lineages, but, of green algal phylogeny, which is reflected in modern classification.<span>
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Advantage: Dichotomous keys are very useful because they allow non-expert users to identify organisms by directing them to look at the known, important organisms. Disadvantage: Disadvantage of dichotomous keys is that if a single wrong decision is made at any juncture, a wrong identification will result. Sometimes it becomes obvious that an error has been made, and you can retrace your steps until you get back on the right track, but this is not always the case
Lipids are made up of carbon, hydrogen, and oxygen. So I'm assuming A would be the best answer. Proteins are made up of carbon, hydrogen, oxygen, and nitrogen and nucleic acids are made up of carbon, hydrogen, oxygen, nitrogen, and phosphorus.