Birds don't have fins as fins are for swimming in water. One could argue that they have scales on their feet as the skin there is tough and 'scaly' but there is not an overlapping matrix of scales like their would be in reptiles.
no some have wings
Fins.
Fins are small aerodynamic wings attached to the rear of the rocket. These are to give guidance and stop it from spinning.
Their arms, legs, tails,wings or fins.
an engine for thrust and wings/fins for control.
Fins/wings etc. usually so they fly straight.
no thay dont thay have wings
fins wings leg
the body parts are eyes and fins
Three examples of analogus structures. 1) Shark fins versus dolphin fins 2) Moth wings versus bird wings 3) Octupus eye versus human eye
Triceratops was a quadrupedal land animal. It didn't have wings or fins, and technically the end of the forelimb is a foot, not a hand, unless the animal is at least partly bipedal. Its front feet each had three toes.
It helps to stabilize them. Without fins/wings the tail will ocilate causing it to vear off course and lose speed and range.