What human activity destroys the most natural animal habitats

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

The spermists believed that: the male made the only hereditary contribution to the offspring the male and female traits were blended in the offspring the female made the only hereditary contribution to the offspring the male and the female made equal contributions to the next generation

They live on every continent except antarctica