Answer:
either deoxyribose or ribose
Explanation:
i can't see the diagram, but-
- if the diagram shows a single stranded chain of rna, then the answer is ribose
- if the diagram shows a double stranded chain of dna, then the answer is deoxyribose
- uracil and thymine are nucleic acids, not sugars/carbohydrates
The cells of the CNS are called neurons. They secrete neurotransmitters.
Answer: Wetlands, animal digestion, along with thermogenic sources such as oil and gas production.
Explanation:
Methane (CH4)
Methane comes from natural sources, such as wetlands and animal digestion, along with thermogenic sources, including oil and gas production. Natural gas is approximately 90% methane. Hope this helped!
Answer:
cell membrane
Explanation:
Single cell organisms like the bacteria depend mostly on diffusion for gaseous exchange. They take in food that does not require complex digestion processes. The cell membrane is selectively permeable and allows absorption of nutrients like glucose that have molecules of small size.
Constant source of non extinguishable energy.
