Which of these would be useful in determining the species
diversity of a pond ecosystem?
A Counting the number of red wing blackbirds
B Sampling areas of the wetland and identifying all the plant and
animal species present
C Performing a DNA analysis of all the reptiles found in the
ecosystem
D Classifying the types of ecosystems that surround the pond

Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.

Where does the information about where each transcription factor binds originate?

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population.b) the separated population is small, and genetic drift occurs.c) the isolated population is exposed to different selection pressures than the ancestral population.d) different mutations begin to distinguish the gene pools of the separated populations.e) gene flow between the two populations is extensive.