A single point mutation in the DNA near the lactase gene changes the cytosine (C) nucleotide to a thymine (T). Individuals with the thymine (T) nucleotide are lactose tolerant and can digest the milk products in adulthood.
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Answer:
The answer is langerhans cells.
Explanation:
The first option is false. Melanocytes are cells that are responsible for the production of melanin throughout the skin of the body which affects the skin color.
The second option is also false. The Sebaceous glands are located at the end of the hairs on the skin and are responsible for producing oil throughout.
The third option is correct because langerhans cells are responsible for producing antigen throughout the skin and they are a part of the skin's immune system.
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D. Oxygen and metal
They usually contain some form of metallic cation, given that carbonates are the most distributed minerals in the Earth's crust.
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Answer:
Stephen Stearns states that natural selection doesn't mean the survival of the fittest organisms, but rather this mechanism is illustrated by the selective reproduction of the fittest. Natural selection can be classified into distinct types, including directional, disruptive and stabilizing selection, which are in turn based on sexual selection. These types of selection are driven by different outcomes that have different dynamics.
Answer:
A plant cell is surrounded by rigid cell wall whereas animal cell does not have cell wall. Presence of a large vacuole in plant cell, which is small in animal cell. Plant cells are larger than animal cells. Plant cells have plastids whereas animal cells do not have plastids.
