Answer: e. acts like a sunscreen that absorbs UV radiation
Explanation: Melanin are body pigment that protects the body again UV radiation it is produced by melanocytes cell. It gives the dark colour of the skin, hair, eye. An albino is side to lack melanin pigment that give the dark body coloration and they wear protection again the damage cause by direct contact of UV.
Melanin can be increase in the skin by the use of some anti oxidants and nutrients such as Vitamin A,E,C which can be gotten from food substances consumed and this helps protect the skin against cancer.
The chemical bonds that hold the two strands of DNA together are hydrogen bonds.
- Deoxyribonucleic acid (DNA) is a double helix composed of two long chains of nucleotides linked together via hydrogen bonds.
- In DNA, there are four different classes of nucleotides, each one containing one different nitrogenous base (i.e., Adenine, Thymine, Guanine and Cytosine).
- According to the base pair rules, Adenine always pairs with Thymine via two hydrogen bonds, whereas Cytosine always pairs with Guanine via three hydrogen bonds.
In conclusion, the chemical bonds that hold the two strands of DNA together are hydrogen bonds.
Learn more about hydrogen bonds here:
brainly.com/question/879463
They are:
Getting and using energy
Reproducing
Maintaining structure
The external ear structure is called the Pinna.
The Pinna helps to channel sound waves into the ear.
Many animals have the ability to move their pinna towards the direction of sound.
I have attached an image of a dog's ear to show you the external structure called the Pinna.
I hope this helps! I'm happy to answer any other questions you might have :)
[Image sourced from: https://www.msdvetmanual.com/dog-owners/ear-disorders-of-dogs/ear-structure-and-function-in-dogs]