2007-02-28 00:42:40 · 5 answers · asked by tararat t 1 in Pets ➔ Other - Pets
there are more- such as the cloaca in birds and most reptiles (some reptiles have a penis, but they are an exception). Fish do not have a penis either- just a cloacal slit.
Some animals reproduce without any sex organs- some species of worms just transmit slime by rubbing agaist eachother.
People just think there are just two because they look at what people know the most about- mammals, which all (as far as I know) have a penis and a vagina-like organ.
Did you know that some marsupials have a forked penis? That is because the female has two vaginas.
2007-02-28 01:19:54 · answer #1 · answered by D 7 · 1⤊ 0⤋
You also have animals (generally too small for people to thing about) that do not have sex organs. The replicate themselves by mitosis (it could be meiosis, I forgot which one is which).
2007-02-28 18:49:48 · answer #2 · answered by Veneta T 5 · 0⤊ 0⤋
Because there only two sexes - male and female.
(Of course, testicles and ovaries, uterus etc. could also be considered sex organs.)
2007-02-28 08:55:41 · answer #3 · answered by Ms. S 5 · 3⤊ 0⤋
You need to take a class in biology
2007-02-28 08:55:55 · answer #4 · answered by Pat B 3 · 3⤊ 0⤋
There is actually more...read up it might be interesting.
2007-02-28 11:06:06 · answer #5 · answered by mistress tiger tat 2 · 0⤊ 0⤋