Hippos likely evolved from a group of anthracotheres about 15 million years ago, the first whales evolved over 50 million years ago, and the ancestor of both these groups was terrestrial. These first whales, such as Pakicetus, were typical land animals. They had long skulls and large carnivorous teeth. Hope I’ve helped ;)
It is important to understand because it's the way all cells reproduce (except sperm and egg cells, they do meiosis), and our cells are the essential parts of our whole being.
1 out of 2 chances. If he was tested for CF at a certain time, he may not have had CF strong enough for the radar to detect it. However, the mother may also carry CF, which could lead to a stronger chance of CF in the next child.
What are the living conditions like for all the animals except the pigs and dogs?
