A testable question is a question that can be answered and solved by creating and conducting an experiment. Testable questions are often about changing one item to see what impact it has on another.
Example:
Does changing the height of the ramp affect the speed of the skateboard going down the ramp?
Skin. hair. nails. hope these helped!
Answer: a niche is a role that an organism plays in an environment. If you want a dictionary definition, here it is.
Explanation:
a position or role taken by a kind of organism within its community. Such a position may be occupied by different organisms in different localities, e.g., antelopes in Africa and kangaroos in Australia
<span>Human skin color variations are primarily being determined by the type and amount of melanin pigment which is the skin.
The reason is the amount of melanin present, pigment present which determines the color of skin the more the melanin the more dark color they are.
Human skin color variation is likely evolved in response to differences in intensity of sunlight around the world. Reason being it has been developed because of different exposure of humans to the varied environment during migration. Human skin color variation evolved recently in hominid evolution.</span>
