7. The periodic table has changed over time as new elements have been added to it. Which is the most likely reason scientists update the periodic table?
A. Scientists rename old elements.
B. Scientists discover new elements.
C. Stars produce new elements that travel to Earth.
D. Past mistakes are corrected in identifying elements.

Apart of an ecosystem that can restrict the growth of a population is referred to as

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that

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.