The answer to either question will be great!! Explain why, if Earth’s magnetic field changes direction again, the existing pattern will not change?

What process of plate tectonics causes the intervals of normal and reversed polarity?

advantage of using stem cells in medical research:

1.       it provides medical benefits in the fields of therapeutic cloning and regenerative medicine.

2. it provides great potential for discovering treatments and cures to a variety of diseases including parkinson disease, spinal cord injuries, diabetes, alzheimer’s disease and many more.

3. limbs and organ could be grown in lab from stem cells and then used in transplant or treat illness.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

yes we can.   a lady urinates from her urethra.

it is called the mitotic spindle