The model shows a portion of a DNA strand. What doe the pentagon represent in the model?

How many chromatids are there in one duplicated chromosome

Which of the following correctly summarizes why bacteria and archaea are not in the same kingdom? A. Only archaea have cell membranes made from straight chains of peptidoglycan. B. Only bacteria are both prokaryotic and single-celled organisms. C.

Can anyone explain the role of the neurotransmitters in the synapse?

What surrounds a cell and separates it from its environment

Which process uses cyanide to extract gold?

If it's not waters a tulip plant wilts because it

Which of the following describes the tundra biome? A. characterized by frost-molded landscapes B. characterized by short growing seasons C. characterized by little precipitation D. all of the above

The basic unit of structure and function in the nervous system is the neuron. a. true b. false 17 Answer: The endocrine system produces chemical messengers called enzymes. a. true b.

What would you do if you had no Tap water

Which of the following is caused by changes in the biogeochemical cycles of the planet?