Gametes are formed by meiotic division, and classified by shape, size and activity. In some species they are undifferentiated, that is, isogamous, resembling, but not identical, regardless of gender. However, most species have heterogeneous gametes (anisogamy), differentiated by morphological, dimensional and mobility aspects.
A is the correct answer because paleomagnetism is the record of Earth's strength and direction in it's magnetic field. It helps us in the knowledge of evolution.
<h3>Playing the role as ” procoter of the help beads ”, the sea otther is able to mantian a balance of the ecosystem , naturally by conusiming sea urchins ...</h3><h2>I hope it is helpful for you....</h2>
