No, it can't. A 1.2 bore elephant gun with 25.000 j muzzle energy (4 times the average sniper rifle) might take down an elephant. Bows won't unless you shoot them in the eye with such an angle as to send the arrow to the brain - and that's a ridiculously impossible shot.
Fred Bear killed an Elephant on a hunt in 1964 with a #75 recurve. That's 25 pounds shy of a 100 lb draw.
Forgive me for being blunt, but you don't know what the hell you are talking about.
It may be arrogant to say so, but I know a /lot/ about weapons. If I state a fact about weapons, it's usually correct. I used to have to learn stuff like this for a living.
I used to own a #70 lb recurve, and I've shot lower curve elephant guns before. I actually put more faith in the bow if I had to bring an elephant down. A lot of people fail to realize that most organic/man made armor is easily penetrated by an arrow. Arrows go right through kevlar and even a #30 bow has the potential to send an arrow right through a deer like it's not even there as long as you don't hit bone.
With wooden arrows and wood/pastic bows? You're right. But a superalloy bow with a pull of 10 tons that shoots 5-pound arrow-sized tungsten darts filled with a half pound of high explosive are another matter entirely.
Something like that would have to be fired from a battleship, and probably still would not penetrate the tank.
Kinetic tension, the pull in a weapon has a point of diminishing returns. It's why they /don't/ have such weapons on battleships.
Additionally, a tank has geometry to deflect incoming shots and reactionary armor on the sides.
I've ridden on and in tanks while I was in the military. You really have to be around one for a while to understand the fantastic engineering.
Additionally, I was a Javelin gunner for a while too. In case you don't know what that is, it's a portable anti-tank weapon - one of the most expensive and sophisticated in the world. The reason it is such a potent weapon is because after locking onto your target's heat signature and firing, the missile actually travels up at about a 45 degree angle and then comes down on top of the tank where it is flat and the armor is weakest.
So in other words, no hard feelings but you're absolutely wrong on all counts.