The oldest rock layer in an undisturbed rock sequence occurs

The correct answer is at the bottom.

Explanation:

The principle of superposition illustrates that in the arrangement of layers, any layer is considered younger, which is present above the layer on which it rests, thus, the below present layer is considered older than the one, which rests upon it. This is known as the law of superposition and is one of the general principles of geology.  

According to the principle of superposition, in an undisturbed sequence of rocks, each layer of rock is older in comparison to the one, which is present above it and is younger in comparison to the one present below it. Thus, it can be concluded that the youngest rocks are present at the top, while the oldest rocks are found at the bottom.  

the sun d the answer is sun

interphase

the period of cell growth when the cell synthesizes new molecules and organelles. the cell is not dividing and it constitutes the majority of the time spent in the cell cycle

prophase

changes occur in the nucleus and cytoplasm. the chromatin condenses to form structures (sister chromatids) visible with a light microscope and the mitotic spindle begins to form, but the nucleus is still in tact

prometaphase

the nuclear envelope fragments and the spindle microtubules attach to the kinetochores of the sister chromatids

metaphase

all the cell's duplicated chromosomes are lined up at an imaginary plane equidistant between the poles of the mitotic spindle

anaphase

begins when sister chromatids separate from each other and ending when a complete set of daughter chromosomes arrives at each of the two poles of the cell

telophase

the daughter nuclei form at the two poles of a cell

cytokinesis

the division of a cytoplasm to form two separate daughter cells. usually occurs during telophase during mitosis. this and mitosis make up to mitotic (m) phase of the cell cycle