The Galapagos islands. the grants studied finches on these islands to learn more about evolution
Earths moon has a surface gravity equal to one-sixth that or earths surface gravity
<span>The molecules that provoke a specific immune response are called antigens.
</span>This molecule initiates the production of an antibody and causes an immune response. T<span>oxins, chemicals, bacteria, viruses, or other substances that come from outside the body can be part of the antigens.
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Semen is a mixture of sperm and seminal fluid, a liquid that consists of the secretions of the seminiferous tubules, seminal vesicles, prostate, and bulbourethral glands.
The seminal fluid (which is primarily composed of water, fructose, proteins, minerals, and other micronutrients) provides the sperm with a transportation medium, nutrients, and protection from the hostile acidic environment of the male’s urethra and the female’s vagina.
Archea are prokaryotes, but their cell walls are chemically different from bacterias.
Archea often live where NOTHING else can such as hot springs and in extremely acidic or salty habitats.
And some molecules in archea aren't found in other living things.
