Question

Determine whether the statements are true or false

1. The alternation of generations life cycle in protists and plants is a homology.

2. Bacteria flagella and euglenid flagella are homologous structures.

Answer 1

(1) In plants and protists, the reproductive cycles are comprised of the sporophytic and gametophytic generation which occur in a cyclic manner. There are certain traits that are homologous among these phylogenetically close relatives/taxa. So the given statement is true.

(2) The bacterial flagella and euglenid flagella are non-homologous structures because their structure is totally different. The bacterial flagella move by rotation while that of Euglena by bending motion. So the given statement is false.