Which of these organelles is absent in a prokaryotic cell ribosome? nuclear membrane? plasma membrane

Which would be an adaptation in a rainforest, but not in a tundra? a. ability to store water for a long time b. fur that blends in with snow c. strong claws for killing prey d. a beak that can dig into thick trees

Aperson with age is more likely to catch diseases that healthy people usually don’t catch.what are these infections called?

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks