Though plants, fungi, and prokaryotes all have cell walls, we place them in different taxa. Which of these observations comes closest to explaining the basis for placing these organisms in different taxa, well before relevant data from molecular systematics became available?
A) Some closely resemble animals, which lack cell walls.
B) Their cell walls are composed of very different biochemicals.
C) Some have cell walls only for support.
D) Some have cell walls only for protection from herbivores.
E) Some have cell walls only to control osmotic balance.
Results of selective breeding for oil content in corn plants.
Herbivores must overcome the wide variety of physical and chemical defences evolved by plants.
A Punnett square depicting a cross between two pea plants heterozygous for purple (B) and white (b)
Effector B-Cell
Phagocytosis. The cell engulfs and digests a bacterium.
Timeline of Major Events in Plants