Producers : Cactus, Sagebrush, annual flowers
Level 1 consumers: Ants, Beetles, Kangaroo rats.
Level 2 consumers: Chuckwalla, Tarantulas, Scorpions
Level 3 consumers: Common king snake, Gila monster, Turkey
Level 4 consumers: Vulture, Hawk, Fox
Decomposers: Bacteria
Answer:
An index fossil is also known as guide fossils or indicator fossil. They are fossils used to determine and identify geologic periods.
The main characteristics of an index fossil include :
1.It must be distinctive.
2.It must be widespread.
3. It must be abundant
4. It must be limited in geologic time.
Due to trends and studies of most fossil-bearing rocks being formed in the ocean, the major index fossils are mostly marine animal or plant organisms.
Oceanic crust<span>tends to be denser and thinner than </span>continental crust<span>, so the denser </span>oceanic crust<span> gets bent and pulled under, or subducted, beneath the lighter and thicker </span>continental crust<span>. This forms what is called a subduction zone. The answer is B.</span>
