I recently got a pet snake, but my wife hates it because it's legless and carnivorous. 
There are a lot of different kinds of snakes. I know the black snake isn't supposed to be venomous.
Normal black snakes aren't bad, but the red-bellied black snake is and causes significant morbidity. I like to live dangerously.
Yes you do. Their organs are situated one in front of the other instead of side by side due to their narrow bodies.
I got my red-bellied from a friend who brought it back from eastern Australia. Don't tell anyone, though. It is less than legal.
Okay. Snakes are thought to have evolved from either burrowing or aquatic lizards, maybe during the Jurassi.c period
Lizard
Lizards are a widespread group of squamate reptiles, with over 6,000 species, ranging across all continents except Antarctica, as well as most oceanic island chains. The group is paraphyletic as it excludes the snakes and Amphisbaenia; some lizards are more closely related to these two excluded groups than they are to other lizards. Lizards range in size from chameleons and geckos a few centimeters long to the 3 meter long Komodo dragon.
Most lizards are quadrupedal, running with a strong side-to-side motion. Others are
venom yield per bite is 37 mg and a maximum yield of 97 mg. Bites from red-bellied black snake are rarely life-threatening due to the snake usually choosing to inject little venom toxin, but are still in need of immediate medical attention. Rate of envenomation is 40-60%, but the untreated mortality rate is less than 1%.
Considerably dangerous Australian brown snakes.
Considerably dangerous Australian brown snakes Dugite.
The Dugite ("Pseudonaja affinis") is a highly venomous Australian brown snake species