Answer:
so it won't get dirty
Explanation:
you don't want the Corona virus do you?
Yeast (Saccharomyces cerevisiae)
Fruit fly (Drosophila melanogaster)
Nematode worm (Caenorhabditis elegans)
Western clawed frog (Xenopus tropicalis)
Answer:
The blood moves into the lungs
Explanation:
i believe the answer is A and D