The most likely cause of the observed variation is adaptation and evolution
The correct answer is: oxygen and nutrients.
Ocean abiotic factors are non-living factors that influence an ocean ecosystem.
Nutrients are substances that ocean organism obtains from their environment in order to grow and live such as nitrogen, phosphorus, sulfur, carbon, iron, potassium, magnesium.
Oxygen is a necessary element required for respiration (most ocean organisms are aerobic), metabolism and other chemical reactions within the organism. Oxygen in the ocean is produced by algae and phytoplankton via photosynthesis.
Rough and smooth ER is the two kinds
Your answer will be Bone Marrow!
Answer:
In about 30 days
Explanation:
Assume Xavier sights a full moon today, it'll take around 29.5 days to see the moon at that size again.
Analysing each of the given options, only option D answers the question because 29.5 days can be rightly said to be about 30 days.
Or better still, 29.5 days approximates to 30 days.