The best and the correct answer among the choices provided by the question is the second choice.
Temporal isolation could be the mechanism that <span>might keep Rana aurora and Rana boylii from mating.</span>
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Amount of wear, and how long they are may contribute with age and maybe even coloration and pigment.
Answer: <u>The exocrine glands hormones could be ions, enzymes mucins, water or chemical compounds that aid in the normal functioning in the human body. The glands that are exocrine are multicellular or unicellular, based on the degree of complexity of the glands as well as their function. Some examples of these are the liver and the Salivary glands. </u><em>Endocrine glands are referred to as hormones. are released by cells in an interstitial liquid. Then, they disperse into the bloodstream, without having to pass through the canal system. The endocrine glands are responsible for monitoring the long-term activity of the body and affect the general metabolism and development in the human body. Some examples of these are the Pituitary Gland and the Adrenal Gland.</em>
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Atomic number shows the number of protons in the nucleus of an atom.
Atomic weight shows the is an another term for atomic mass, which means <span>It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.</span>
