Summer's considered the best out of the 4 seasons because most people are on summer vacation and they are able to spend quality time with their family without all the snow or cold weather.
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.
Because there always needs to be something that starts it off. Eg: If there was no grass, there would be no animals.
The ecological relationship between termites and the wood-digesting protozoans that live in their gut is an example of mutualism. Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.
