a)the number of species on Earth or b)the number of individual organisms on Earth
The role a of a digestive system is
Your digestive system breaks down the food you eat into nutrients such as carbohydrates, fats and proteins. They can then be absorbed into your bloodstream so your body can use them for energy, growth and repair.
Answer:
A nationwide effort measured trace organic compounds (N = 33) in water and sediment of 42 lotic ecosystems across the US. The most common compounds were caffeine, carbamazepine, cotinine, sucralose, sulfamethoxazole, triclosan, and venlafaxine.
Explanation:
The one component of a cell that distinguishes all three domains from each othe is the nucleus
