Answer:
Explanation: Sponges are animals with dense skeletons that are highly adapted to their environments.
Answer:
Akira turns in a written lab report to his science teacher. ... Akira writes in his notes that adding a catalyst sped up the chemical reaction because the catalyst lowered the activation energy needed to start the reaction.
Http://www.livescience.com/22537-skeletal-system.html
The Mfp factor is present in meat, fish, and poultry that enhances the absorption of non-heme iron that's in the same foods or in other foods eaten at the same time.
