T cell receptor, Cytotoxic T Cell, CD4, Antigen, Bacterium,
B – cell, Cell mediated response, Class II MHC, Cytokines, and Humoral Response
are the components for the activation of a helper t cell by a dendritic cell.
According to Gloger's rule, endothermic creatures should have darker hues in hot, rainy areas. The so-called complex Gloger's rule also states that animals should be more rufous in warm, dry regions.
Explains the connection between animal color variation and large-scale climate gradients. Bernhard Rensch gave it that name in 1929 to honor Constantin W.L. Gloger, who was one of the first to write about relationships between animal pigmentation and temperature in 1833.
Gloger's rule, as it is known now, states that mammals and birds should be darker in warm, humid settings than in colder, dry ones.
Gloger's rule-related color variation is mostly caused by variations in melanin pigmentation, according to this quick reference.
The most prevalent pigment in birds and mammals, melanin's are of two primary types: pheomelanin's, which produce brown, buff, and rufous colors, and eumelanin's, which produce black and different shades of grey. Both generate intermediate hues when combined.
To know more about color variation :
brainly.com/question/14011568.
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Answer:
The correct answer is - natural selection.
Explanation:
Natural selection is the process in which an organism adapted according to environmental changes for its survival and increase there number by reproduction.
Charles Darwin was first to explain its activities and now it's established as the major process behind the evolution.
Aye aye, primate adapted according to the environment and develop a character for its survival over a period of time. Natural selection is the connection between structure and function.
Thus, the correct answer is - natural selection.
Answer: A
Explanation: Its three leafs and tear drop shaped.
Nitrogen-rich compounds found in animal waste or the remains of dead plants and animals are converted to <u>ammonium ions</u> by decomposer bacteria.
Hope that helps!