The crown shaft of a Royal Palm and the pseudostem of a banana are really: a) leaf sheaths b) shoot apices c) extrafloral nectaries d) rhizomes One of the principal differences between plant and animal cells is that plant cells: a) plump when you cook them b) have cell walls c) squeal when they are crushed d) lack chloroplasts When examining the salient characters of a plant such as the leaf margins, variations among types of margins, such as entire, crenate, serrate or undulate would be called: a) character estates b) character states c) states of affairs d) seedy characters .