Answer:
A steel frame used to make a bike.
Scientists often perform experiments to check and recheck their work. They also redo these experiments to ensure correct results.
Answer:sponge is one answer.
Explanation:
The answer is letter A.
<span>Organelles and other cellular material are held within a cell by a cellular membrane. These membranes are what consist of a cell's exterior.
</span>
<span>Thank you for posting your question. I hope you found what you were after. Please feel free to ask me more.</span>
Those would be oceans and lakes. Hope this helps and have a nice day!
