Which sentence best describes the axis of rotation of earth?
a.
the axis changes the direction of its tilt over time.
b.
the axis has a slight tilt.
c.
the axis tilts so that it is almost horizontal.
d.
the axis does not have a tilt

The leopard frog and the pickerel frog are two closely related species. in areas where their ranges overlap, the frogs will remain separate species if they

Which of the following is a responsibility of a scientist

According to the article, what valid claim came from the national research council? there is no association between fluoride exposure and increased cancer risk in humans. there is a possible link between fluoride exposure and increased cancer risk in humans. there is a definite link between fluoride exposure and increased cancer risk in humans.