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

lets get this bread mom

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

i think that it is c, d, and e, hope this

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.