Why is it important for egg and sperm cells to join in fertilization? why can't an egg or a sperm cell alone develop into a new individual?

Describe pasteur’s results and how they disprove spontaneous generation.

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.

Consider this plant cell which organelle is labeled g