<h2>D. Radioactive decay </h2>
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I believe the answer is that a dimpled chin is controlled by a single gene with multiple alleles and height is controlled by many genes. Alleles are alternative forms of a gene, and they are responsible for differences in phenotypic expression of a given trait. A gene for which at least two alleles exist is said to be polymorphic.
Answer:
Ectotherms are also called poikilotherms.These are animals whose temperature varies with that of the external temperature.
Explanation:
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Explanation:
who many chambers does the heart has
A.) water is polar, but lipids are nonpolar
