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nekit [7.7K]
3 years ago
13

Brian's hypothesis states that "Sunscreen lotions with higher SPF (Sun Protection Factor) ratings are able to block larger UV ra

diations, hence, they provide better protection." Which of the following information can be used to test the hypothesis? A OA graph of the SPF ratings of various sunscreen lotions versus the absorbed UV levels. B. A table that contains the number of people using the sunscreen lotions and their UV levels. c. An article that describes the amount of UV exposure per the location. D. An online survey of people who use lotions on a regular basis.​
Biology
1 answer:
dusya [7]3 years ago
8 0

Answer:

tbh A seems the most right not sure tho

Explanation:

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Answer:

The correct answer is D. Umbilical cord

Explanation:

The umbilical cord connects the fetus to the placenta and through it exchanges nutritional substances as well as oxygen-rich blood. The umbilical cord is maintained throughout gestation until the moment of birth, when it is cut and leaves a permanent scar, the navel. The umbilical cord is responsible for breathing and feeding the fetus until the moment it is born, so any failure or blockage in the circulation of oxygen and nutrients through the cord can lead to injury or even death of the embryo. It also serves to remove waste and carbon dioxide (CO2).

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