RNA from a bear is compared to RNA from a sunflower. Both will contain the sugar deoxyribose and the base thymine
sugar deoxyribose and the base uracil
sugar ribose and the base tymine
sugar ribose and the base uracil

RNA from a bear is compared to RNA from a sunflower, both will contain the sugar ribose and the base uracil.

In conclusion, if RNA from a bear is compared to RNA from a sunflower, both will contain the sugar ribose and the base uracil.

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i believe the correct answer from the choices listed above is the first option. the scientists need to look at the   validity of data, claims, hypotheses, and observations before  developing an argument. they base their arguments on facts that are present and they make sure they have proofs. 

explanation:

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation: