How do scientists identify cycling from winter to summer when analyzing the ice cores? What causes this to happen?

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

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

Deer cave cannot support photosynthesis is as not enough sunlight is present. in spite of this, it still has a complex food chain. what is the energy foundation of this food chain?