Specific immunity results in A( the production of antibodies
B( redness around the wound
C( a fever
D( macrophages ingesting pathogens

Heat from earths interior and pressure from overlying rock transform the remains of marine sediments into

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?

During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming