Answer:
Lightly pigmented people tend to be at higher risk of vitamin D deficiency
Explanation:
BACKGROUND KNOWLEDGE:
Human skin is the largest organ of the body which makes boundary line between environment and internal conditions. Human skin cell produces pigment called melanin when ever it is subjected to Sun. More the melanin pigment produced more will be the skin darkens. Ultraviolet (UV) radiations also come from Sun and responsible for more pigmentation.
ANSWER EXPLANATION:
According to the question darkly pigmentation only occurs when their is high level of UV radiations. High level of UV radiations are also responsible for Vitamin D production.
People with lightly pigmented means that there environment has low level of UV radiations which are the requirement of Vitamin D production. Hence due to low UV radiations peoples with light pigmentation's are also be at higher risk of vitamin D deficiency
The correct answer is (c.) Animal-like protists differ from plant-like protists as the animal-like ones are heterotrophic in nature, whereas the plant-like protists are autotrophic. Heterotrophic is an organism in which uses carbon for growth and autotrophic is an organism in which produces complex organic compounds.
The correct statement is liver cells possess transcriptional activators that are different from those of lens cells.
<h3>What are Transcriptional activators?</h3>
Transcriptional activators are specific protein sequences capable of activating gene expression.
These transcription factors (transcriptional activators) act to regulate gene expression in target cells.
Transcriptional activators are factors that enable the expression of certain genes in particular cell types.
Learn more about Transcriptional activators here:
brainly.com/question/12150990
Answer:
Scientists repeats the steps in cycle mode and in order to be sure about the results he/she chosen.
