In a family with two brothers, one brother's thumbs are straight while the
other's thumbs are bent. the most likely reason for this difference is that the
brothers:

What pattern of migration do whales follow?

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.

Which of the following is most likely the result of an organism having lipids in its body a) water cannot be absorbed through the surface of a leaf b)human eats fruits to get a quick source of energy c) a sheep sleeps for more hours in the winter d) a warm river is filled with fish and algae