90 POINTS PLEASE HELP ANSWER IT ALL PLEASE
Practice: DNA Structure and Replication
1. Label each part of the model to the right. Include specific nitrogen base pairs
in your labeling
2. What molecule is it?
3. What is its purpose?
4. Where can it be found in a prokaryotic cell?
5. Where can it be found in a eukaryotic cell?
6. It gets copied during a process called replication. When does this happen?
7. What is the result of DNA replication?
8. Why is DNA replication necessary?
9. Why is DNA replication said to be semi-conservative? Draw a picture to support your answer.

The diagram below represents a marine food web and a process that can harm the human population. each circle represents an organism and the smaller dots inside them represent a toxic substance. what is being represented and how does it harm the population? the diagram represents biological half-life, in which toxins build up in organisms higher up on the food chain, and this can negatively impact humans who consume the organisms and the toxic substance. the diagram represents biomagnification, in which toxins build up in organisms higher up on the food chain, and this can negatively impact humans who consume the organisms and the toxic substance. the diagram represents the process by which different organisms prey upon each other; this can impact the human population by reducing the number of organisms that do not contain the toxin. the diagram represents the way that toxins are metabolized by living organisms, with those at greater trophic levels able to metabolize more efficiently than those at lower levels. this means that those at higher tropic levels are safer for humans to consume compared to the organisms at lower trophic levels.

What is the most appropriate method of gaining weight (muscle mass)

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food