In prokaryotes, transcription and translation can happen simultaneously because A. DNA and ribosomes are both located in the nucleus.
B. DNA and mitochondria are both located int the nucleus.
C. DNA and ribosomes are both located in the cytoplasm
D. DNA and mitochondria are both located in the cytoplasm.

The regions on the RNA molecule that aren’t trilateral are called
A. Untranslated regions
B. Starting points
C. Codons
D. Ending points

An ecologist is studying the effects that a population of predators is having on a population of a prey. he used data from the field to produce this graph. which conclusion can draw from the graph?

Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.

Food webs - transferring energy and matter from one level to another. here you see four food webs. one or more are incorrect. which food web(s) show the correct sequence of organisms, from start to top level consumer? a) a b) d c) c d) a and d