PLEASE HELP Two cells are close to each other during early embryonic development. However, one
of the cells becomes a muscle cell while the other becomes a liver cell. What is the
best explanation of why this occurs?
They contain different DNA during the initial zygote formation.
They receive different chemical signals in gene expression.
They receive different electrical signals to activate DNA replication.
They translate different genes from the same transcription.

Prior to the mt. st. helens eruption on may 18, 1980, satellite and topographic views of the volcano were captured. based on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m? question 9 options: 600 m 400 m 750 m 500 m

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.

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?