1. which of these is an environmental effect of building dams
a) decrease water temperature
b) weed growth downstream
c) increased land fertility downstream
d) soil erosion upstream

2. which of these is an environmental effect of destroying wetlands
a) loss of habitat
b) smog
c) acid rain
d) less flooding

: )

1. which of these is an environmental effect of building dams

D) Soil Erosion Upstream

2. Which Of these is an environmental effect Of destroying wetlands

A) Loss of habitat (wetlands are a major source of various aquatic plants as the wetlands have a great quality soil. This vegetation helps various creatures to grow and reproduce. When these lands are destroyed, the species gradually die or move out to some other stream.)

the answer is a or when it says crossing over

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."