Suppose that the organisms in each level of an energy pyramid use 90% of the energy from the previous level. if a mouse eats a plant and a snake eats the mouse, how much energy from the plant is stored up in the mouse for the snake to use? %

Imagine that certain laws of physics could be ignored and you were able to travel vast distances in moments. now imagine that you traveled to an earth-like planet located light-years away that is known to support life. think about what you’ve learned in this unit and make an argument for what you think would be the dominant type of life form on this planet. consider whether a notochord is required for an organism to manipulate its environment and become a dominant creature.

Greenthe fossil record is the history of life recorded byhuman observationgod.climatologists.remains of the past.

24. how are vaccines used to keep people healthy?