Answer:
In order for pregnancy to happen, sperm needs to meet up with an egg.
Hi!
Could you please be more specific, so that I can answer your question properly? Layer of what?
Bacteria: are single-celled microscopic organisms that are characterized by the presence of incipient nucleus and few membrane-less cell organelles.
Fungi: are eukaryotes that are characterized by the presence of chitin in the cell wall.
Cell Type: All bacteria are prokaryotes. All fungi are eukaryotes.