[linux-yocto] Aren't all tasks in recipe called by default ?

[Ran Shalit]

Hello,

I noticed that
bitbake core-minimal-image does not deply sdk
for sdk I needed to do:
bitbake core-minimal-image -c populate_sdk

But I thought that all tasks in recipes are being called by deafault
when creating image,

Isn't that correct ?

Thank you,
Ran