8. Write yes or no to indicate whether the options apply to index fossils or not: the organisms lived during a particular, short time period
a)
b)
the organisms lived over a long span of time
)
c)
found in sedimentary rock
d)
found in igneous rocks
SO
e)
three criteria
f)
easily recognized
g)
not very many of the organisms existed
found on only one or two continents
h)

Plz fast biotechnology is a growing field of applied biology. many crops such as corn have been engineered to be resistant to herbicides. therefore farmers can spray these chemicals to kill weeds growing near the crop without worries of killing the crop itself how does this type of biotechnology work? a. by changing the genetic make up of the crops. b. by causing the crops to kill the weeds. c. by changing the type of crops used. d. by changing the location of the crops.