Matter and energy are transferred through food webs beginning with solar energy used for photosynthesis a catastrophic event eliminates all plant life associated with this food web hypothesize as to the result of eliminating all the plants in this situation
A. Birds and nematodes would thrive
B. The food web would completely collapse
C. The food web would produce more bacteria to compensate
D. Only the fungi would survive

Some mining processes involve removal of large areas of earths surface in the mined region this practice causes severe environmental damage by allowing which natural process to accelerate in the affected areas? a.precipitation b.erosion c.migration d.condensation

What was darwins theory of common decent

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.