Begonia semperflorens is the scientific name for begonia flowers. Brassica oleracea is the scientific name for plants that produce broccoli, cabbage, cauliflower, Brussel sprouts and kale.
"Biology" is the word that starts with a B and is related to science and plants. It is the branch of science that studies living organisms, including plants.
Something that is used to stay warm that starts with the letter B could be a blanket.
blouse
boots
bullying
Blackboard
Blaming others is bad. It begins with the letter B.
bright
Battles are renewable.
Something that is used to stay warm that starts with the letter B could be a blanket.
Broom
blender, bread box