Which statement accurately compares archaebacteria and eubacteria? Both take different shapes and sizes. Both are always heterotrophs. Both can sometimes live in extreme environments. Both are known as "true" bacteria.

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.

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

The relationship between intron and exon