A scientist studied a population of gorillas in central Africa for one year. During this time, four gorillas were born and one orphaned gorilla joined the group. Two older gorillas died and three males left the population to find mates. The calculated population growth was , indicating that the population .

many women had to remain at home while husbands found work.

explanation:

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.

the roman empire began to fall