The following cell structures are located within cells that make proteins. Which description best explains the relationship among these cell structures in making a protein?
• nucleus
• ribosome
• endoplasmic reticulum (ER)

A. ER creates proteinDNA in the nucleus codes for ribosomes to surround proteinfolds into its active shape
B. nucleus makes proteinwinds through the ERprotein folds into its active shape
C. DNA in nucleus codes for proteinassembled in ribosomes and moves to ERprotein folds into its active shape
D. the nucleus directs ER to assemble the proteinribosomes surround proteinfolds into its active shape

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation:

c. heat from the poles back down towards the equator.

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