No, none can tell that by the shape of a leaf, unless a certain kind of leaf is poisonous and has a certain shape, but not for all leaves.
Generally, specific shape or color can be indicative. That is not always the case though, so an identification guide that was composed by people's hard won experience, so to speak, is always handy.
No, clovers can not be poisonous to frogs.
no...... no......
No
no
No, not at all.
Shape of Ficus leaf is chordate
if it has a diamond shape head it is poisonous
no
the size is big while the shape is normal
The leaves are poisonous and should not be eaten
palm shape