Answer:
C - Methanogens
Explanation:
As their name says, methanogens are organisms that produce methane, turning CO₂ and H₂ into methane and water as a way of obtaining energy.
While some methanogens are found in extreme environments, the most common place where you can find them is inside the human body, as a part of the human microbiota.
The human microbiota is the set of all living organisms that live inside the human body, helping it in different ways. Methanogens, in particular, are present in the gut and produce the methane expulsed in flatulences, being an important part of the process of digestion by reducing H₂ levels.
Answer:
A. Heritable
C. Affected by the MC1R gene
D. Polygenic trait
Has evolved due to evolutionary processes such as natural selection.
Explanation:
Human skin color is a polygenic trait as it is regulated by more than one gene. Each allele of these genes has an additive effect on the overall skin color of an individual. Therefore, the trait is a continuous trait, not a discrete one. The genes for human skin color are transmitted from parents to progeny which in turn makes it a heritable trait.
The gene MC1R codes for melanocortin 1 receptor and thereby, regulate the skin color of humans since melanocyte-stimulating hormone binds to the receptor to trigger the synthesis of melanin from melanocytes. Evolution of various skin color in human beings is regulated by natural selection which in turn favors the skin tone best suited under the prevailing climatic conditions of a particular human population
The three main systems of government used today are unitary systems, federal systems, and confederate systems
Answer:
subluxation.
Explanation:
Subluxation is the partial displacement of a bone from its joint.
Dislocation is complete displacement of a bone from its joint.
Luxation is complete separation of joints.
Sublocation generally return to its normal position without the help from orthopedic doctor.
Example; Nursemaid's elbow caused by subluxation of head of radius from annular ligament.