Question

I need life science help! Can someone please help me?
I will fan and medal. The questions are inside.

Answer 1

Which of these is an environmental effect of building dams?




decreased water temperature upstream



soil erosion upstream



increased land fertility downstream



weed growth downstream

Answer 2

@Qwertty123

Answer 3

best answer would be A i believe. Decreased flow rate creates still water which reduces water friction creating colder temperatures

Answer 4

Thanks! Here is the next question:

What happens when a parking lot is built in a wetlands area?




Less precipitation occurs in the area because it has no place to be absorbed by the ground.



Rain percolates through the pavement into the ground below, causing cracks in the pavement.



The wetlands area moves to a new location alongside the parking lot.



Runoff carrying pollutants, organic material and excess nutrients flows directly into lakes and rivers.

Answer 5

Im think either B or D... hard to pick honestly...

Answer 6

Do you mea A or D? Because I am not sure I would count B as one of the choices. Which one are you pointing to the most? I am thinking A.

Answer 7

*mean

Answer 8

well concrete/pavement can still partially absorb water.. so i think maybe D?. wetlands are usually below sea level though..

Answer 9

I agree. Thanks! Next question:

Which of these is an effect of overcrowding in an environment?




increased food supply



increased competition This one?



loss of habitat



cooler temperatures

Answer 10

Increased competition sounds like the best answer. More organisms = more competition for food/ shelter in the ecosystem

Answer 11

Thanks! Here is the next 2 questions:


How can humans decrease the rate of endangered or extinct species?




Introduce new predators to an environment.



Minimize habitat destruction. this one?



Pollute other environments.



Create and populate more zoos.





.

2 points


Question 5





Which of the following is Not a likely result of destruction of wetlands?




increased frequency of floods



overgrowth of reeds and cattails This one?


pollution of nearby streams


decline in plant and animal populations