Which of the following statements is not true? a)the smooth er has no ribosomes. b)the smooth er functions according to what type of cell it is in. c)the rough er has ribosomes. d)the rough er functions according to what type of cell it is in.

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.

Where can a dna be found in a prokaryotic cell