Tetrahymena has how many mating types?
7
How do earthworms mate?
earthworms of any gender have the ability to make sperm and egg
they cannot fertilize themselves
What is organogenesis?
process by which embryonic cells become organs
Eukaryotes use 3 ways to alternate haploid and diploid:
mating types (most unicell Eukaryotes)
male and female parts (most plants)
male and female individuals (most animals)