Answer:
The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet.
D) Long chains of amino acids used for building, repair, and maintenance
Proteins are made up of amino acids, and they are used to create substances (like hair, nails, etc.)
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You may find them floating in the cytosol. These floating ribosomes make proteins that will be used inside the cell. Other ribosomes are found on the endoplasmic reticulum.
Answer:
The best way to determine if these populations form part of the same species is to study the existence of reproductive isolation between populations. Moreover, the result of an experiment based on the study of reproductive barriers may be complemented with molecular biology approaches that determine the level of sequence homology between populations
Answer;
Nasolacrimal duct
The runny nose you get when you cry is a result of your tears draining into the nasolacrimal duct.
Explanation;
The nasolacrimal duct is the duct that carries tears from the lacrimal sac of the eye into the nasal cavity.
Tears normally drain through small openings in the corners pf the upper and lower eyelids called puncta and then enters the nose through the nasolacrimal duct.
The puncta and the nasolacrimal duct are part of the nasolacrimal drainage system.
