Pa Answer Please


Which structure is the simplest level of organization in humans?
A.cell
B.organ system
C.organ
D.tissues

The stomach, urinary bladder, lungs, heart, and brain are examples of what level?
A.organ system
B.organelle
C.organ
D.tissues

Organs that work together to perform a related function is called _____________?
A.organ system
B.biosphere
C.organism
D.ecosystem

If you see banana trees, santan plants and wild grasses in your back yard, this is an example of a ________
A.population
B.biosphere
C.community
D.ecosystem

All living factors or organisms that affect an ecosystem are called ___________
A.biotic factors
B.abiotic factor
C.trophic level
D.food chain

A biome is made up of _____________ in a large geographical location.
A.different species
B.different communities
C.different ecosystems
D.different populations

A group of toads falls under which level of organization?
A.biome
B.community
C.ecosystem
D.population

Which of the following is the smallest level of organization based on the pyramid of life?
A.organism
B.community
C.organ system
D.populations