Subunits of a cell function independently

Which of the following lines of evidence would best support your assertion that a particular plant is an angiosperm? a) it produces seeds. b) it retains its fertilized egg within its archaegonium. c) it lacks gametangia. d) it undergoes alternation of generations.

Explain the significance of meiosis in sexual reproduction

Abotanist scrapes pollen off a flower