a. True
b. False
A.little impact when humans exclusively use fossil fuels for power needs
B.great impact when humans use alternative water sources for nondrinking functions
C.little impact when humans plant different types of trees for different uses
D.great impact when humans maintain a diverse diet that includes various protein sources
Answer: B. great impact when humans use alternative water sources for non drinking functions.
Great impact when humans use alternative water sources for non drinking functions is the correct option because use of alternative water sources can deplete the overall available water for the present as well as for the future generation of the human population. This is against the concept of sustainable development which suggests that natural resources should be used in such a way so that these can meet the needs of the present population as well as that of future generation.
B) Great impact when humans use alternative water sources for nondrinking functions
Barium
Krypton
Strontium
All of the above
A) evolution by natural selection, sweet peas
B) inheritance by independent assortment, sweet peas
C) evolution by natural selection, Galapagos finches
D) inheritance by independent assortment, Galapagos finches
Correct answer: C). Evolution by natural selection, Galapagos finches
Charles Darwin gave the theory of natural selection in the year 1835 when he visits Galapagos Islands.
There he found several species of finches are adapted to different environmental niches. They have a different shape of the beak, food source they eat and the way they captured the food.
He observes that species vary from island to island, and based on these observations he gave the theory of natural selection.