In prophase 1:
Chromosomes become visible, crossing-over occurs, the nucleolus disappears, the meiotic spindle forms, and the nuclear envelope disappears.
In metaphase 1:
The pairs of chromosomes (bivalents) become arranged on the metaphase plate and are attached to the now fully formed meiotic spindle. The centrioles are at opposite poles of the cell.
The land and the aquatic are the two types of global food webs
Animals obtain nitrogen by eating plants which has absorbed nitrogen from the soil.
it's cururururuvy it curves up and then down