Answer:
In environments with a high level of UV radiation darker skin protects against the harmful effects of UV radiation. According to the evidence, melanin is found in the upper layer of the skin human and absorbs UV radiation, which protects cells against the harmful effects of UV light. The genetic
determine the type of melanin and the amount of melanin present in the cells of an individual. Ultraviolet radiation causes damages DNA and disrupts normal chemical reactions in cells. These processes are greatly mitigated by eumelanin that is abundant in dark skin. This condition also gives protection of folate metabolism against deficiencies caused by strong UV radiation, there is evidence from epidemiological studies that indicates an association between dark pigmentation and a lower rate of neural tube defects due to lower decomposition rates folate.
Answer:
A, Dolphin
Explanation:
Dolphins are mammals, so they have a heart and intestines and of such because they eat and breathe.
Answer:
The correct answer is D- Observe the feeding behaviors of seagulls.
Explanation:
A biological activity can be understood as a the process in which a living being modifies it's biological components in order to survive.
In order for an activity to be considered biological, a living being has to be present in the process.
In this particular case, there are three answers that lack the presence of a living being.
Answer a: Talks about sand (Not living being)
b: Minerals: (Not living beings)
c: Tidal: Not living beings.
So, in conclusion, D- Observe the feeding behaviors of seagulls (living beings) is the correct answer.
Answer: Fossils of limb structures provide evidence that ancient and modern tetrapods are related because it backs up the fact that both ancient and modern tetrapods follow the one bone two bone many bone digit pattern. It suggests to how modern and ancient tetrapods have the ancestry which come from early tetrapods.
Hope this helps.... Stay safe and have a great weekend!!!!!! :D