Aclade is a fancy word for any group phylogenetic tree that includes an ancestor and all of its descendants. a simplified dinosaur tree is to the right.

Ascientist and her team counted 200 individual deer in an area of 10 square kilometers. what is the population density?

Which event would lead to primary succession of a forest?

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.