D.All of these is the answer
Answer:
A Starfish is Triploblastic meaning they consist of three germ layers. Hydra are diploblastic meaning they consist of only 2 germ layers.
Answer:
Many of the current bacteria originated from ancestors that were more than 3.5 billion years ago capable of turning Solar energy to fuels.
Explanation:
The method of photosynthesis uses Solar energy to generate sugar in water, carbon dioxide and oxygen as waste products to produce plants, algae, and cyanobacteria.
Answer:
b. It is a testable statement.
Explanation: