It is often argued that viruses are not living why

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

Does all the energy stored by the phytoplankton reach the top level of the pyramid

Cloning an individual usually produces orangisms that (1) contain dangerous mutations (2) contain identical genes (3) are identical in appearance and behavior (4) produce enzymes different from the parent