<span>harsh conditions.
</span><span>high scalers' work </span>
Explanation:
oxygen and glucose
carbon dioxide gas, water and ATP.
hope it helps. :)
Crossing over at prophase I results in the linked genes (those on the same chromosome) becoming unlinked and separated. Prophase I is this first stage of meiosis, the chromosomes condense, form tetrads, and exchange DNA. The nucleolus and nuclear envelope disappear.