Screenshot 1. The graph below represents changes in two different fish populations over time. Which of the following most likely caused the change in the fish population after Year 3?

A. A change in habitat occurred so the orange fish could no longer blend in with the habitat.

B. The food source for all the fish decreased.

C .A change in habitat occurred so the dark green fish could no longer blend in with the habitat.

D. Climate change affected the habitat killing off the bright orange fish.

Screenshot 2. Use the chart below to identify the term that best describes the energy role for each organism. Which of the following correctly describes the energy roles of the organisms in the table?

A. 1 – Herbivore, 2 – Scavenger, 3 – Decomposer, 4 – Carnivore, 5 – Omnivore

B. 1 – Carnivore, 2 – Decomposer, 3 – Scavenger, 4 – Omnivore, 5 - Herbivore

C. 1 – Decomposer, 2 – Scavenger, 3 – Omnivore, 4 – Herbivore, 5 – Carnivore

D. 1 - Carnivore, 2 – Decomposer, 3 – Scavenger, 4 – Herbivore, 5 - Omnivore

screnshoot 1 - C

screenshoot2-C

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!