In _[blank]_ the cuplike opening of the gastrula develops into the organism's mouth.

Which of these best describes what occurs during cytokinesis? a) the chromosomes are separated b) the cell begins to divide by replicating the chromosomes c) the cytoplasm is divided between the two new daughter cells d) the nucleus opens to allow the chromosomes to enter the cytoplasm

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

What are 3 reasons that natural selection occurs