Venom can kill, generally, in three different ways. A nerve toxin, such as from a rattlesnake or black widow, shuts down nerve pathways and thus the body's organs. Bee venom, for example, can cause a deadly allergic reaction, stopping the victim's breathing. Finally, a bacterial toxin, such as from a Komodo dragon's bite, causes a deadly infection.
Yes. It can kill any shark by its deadly venom.
No, butterflies do not have venom that can harm or kill humans.
Hornets can kill someone if they are allergic to the venom. And if enough of them sting someone, they could go into shock and that could be a problem.
Platypus venom would certainly be enough to kill a snake - but the snake could well inject its own venom in the platypus at the same time.
if the right anti venom is on hand you could survive
No. A lionfish is very poisonous, and a lionfish can poison it with its venom.
If it is a very potent poison, then, yes. It can.
with anti-venom
No, it can kill you.
It depends on the species, the amount of venom injected, and health of the victim. The eastern diamondback, the largest species, injects larger amounts of venom, and could kill in a matter of hours. The Mojave has the most toxic venom, ounce for ounce, and could also kill in that amount of time.
The Solenodons poison is so powerful it could kill an elephant in one bite
Yes, but the komodo dragon could injure it badly with claws and venom.