If a wildfire destroyed all the trees in a forest, what might happen to the ecosystem? select all that apply.
a. new types of trees will start growing.
b. animal populations and trees will be unchanged.
c. minerals from the ashes will nourish the soil.
d. no energy will be transferred in the ecosystem ever again.
e. the burned trees will give off extra energy to primary consumers.

Which line in the graph above best illustrates an effect of the carbon dioxide level in the blood on breathing rate before, during and after a period of exercise? 1.b,2.c,3.a,4.d

24. how are vaccines used to keep people healthy?

2pomis which of the following would be a valid hypothesis for a scientific investigation about how transportation affects food security? alcannotatiord foods purchased from the local farmers market. o b. how does the distance a food travels affect its affordability? o e foods that travel great distances cost less than foods bought o d why do local farmers markets have food with such high prices?