As trees are plants, there's no such thing as a non-kosher tree.
An apple is considered kosher because it is a fruit that grows on trees, which inherently makes it permissible according to Jewish dietary laws (kashrut). As long as it has not been processed or contaminated with non-kosher substances, it is deemed fit for consumption by those who observe these laws. Additionally, apples do not require special preparation or supervision to be considered kosher.
It is kosher so long as it is certified kosher.
Fox meat is not kosher. See:More about what is and isn't kosher
It needs to be cooked in a kosher vessel and have kosher ingredients. If purchased, it (or the bakery) should have kosher-certification.
Yes and no. There are many recipes that can be made kosher with kosher substitutes.
Delicatessen places serve kosher food. And if you are talking about 'deli' food, it is usually kosher. _______ Delis are only kosher if they're kosher certified. Most delis aren't kosher.
Yes! You don't need a kosher cookbook. Just remove the non-kosher ingredients.
It would be kosher if it came from a kosher animal.
It can be if it's made with kosher ingredients in a kosher kitchen.
They can eat a kosher diet, and be slaughtered the kosher way.
Fish and chips can be kosher so long as the fish used is a kosher species and the food is prepared in a kosher kitchen with all kosher ingredients.
No. Turtles are not kosher.