Attached earlobes are a recessive trait in humans. In the tree below people with attached earlobes are shaded in. Which best describes the person
labeled X in the tree?
A. A female with one recessive allele
B. A male with one recessive allele
C. A female with no recessive alleles
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D. A male with no recessive alleles

Which of the following best describes the purpose of technology?

What are the student's observations and inferences before he starts his investigation?

Hormones are chemical molecules produced by endocrine glands. one such endocrine gland is the thyroid gland, which synthesizes the thyroid hormone, which in turn affects the heart muscles. which two statements describe the probable reason for the function of the hormone? the cells in the heart have specific receptors that allow for the intake of hormones. the heart and the endocrine glands have the exact same types of cells. all cells make the same types of hormones. thyroid hormones show their effect on the heart by means of specialized cells. thyroid cells and cardiac cells have different dna.