Which of the following is evidence for the genetic component of intelligence?
1) low scores by children in orphanages with high caregiver-infant ratio
2) identical twins raised apart have more similar test scores than non-twin siblings raised together
3) identical twins raised together have more similar test scores than identical twins raised apart
4) increased schooling correlated with higher test scores

What percentage of the earth's water is available for use by living things?

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Afarmer began a new method of reducing grain spills. this reduced the number of mice on the farm. the number of snakes in the surrounding area decreased at the same time. the snakes depended on the mice that lived in the field. what’s the likely reason the snake population decreased? a. the number of snake predators increased. b. the number of mice increased. c. the number of mice decreased. d. the pesticides affected the snakes. e. a new breed of mice moved into the field.