PLEASE PLEASE HELP i will mark brainliest

1. What is an “ecosystem?” Give two examples of different ecosystems.

2. What are the three energy roles an organism can play in an ecosystem? List AND define:

3. Describe the differences between the different kinds of consumers (carnivores, herbivores, omnivores, and scavengers):

4. What are two examples of decomposers? Why are decomposers essential to ecosystems?

6. in the dna double helix, how are the two strands of dna held together? a. chemical bonds between base pairs hold the two strands of dna together. b. hydrogen bonds between the base pairs hold the two strands of dna together. c. hydrogen bonds between sugar groups and phosphate groups hold the two strands of dna together. d. chemical bonds between sugar groups and phosphate groups hold the two strands of dna together.

You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13

Based on the data in the graphs do you think pepsin and trypsin are found in the same part of the body? explain your answer.