sorry i could only do first answer
but here it is
Crossing-over is the exchange of genetic material between homologous chromosomes. It results in new combinations of genes on each chromosome. When cells divide during meiosis, homologous chromosomes are randomly distributed to daughter cells, and different chromosomes segregate independently of each other.
Plants need nutrients to survive with out nutrients
Hello there! I hope I can help!
Here's the page, filled out for you.