Ineed this asap! for the location and geologic periods represented by these rock layers, the most drastic and sudden change in life forms occurred at the end of the geologic period. a. carboniferous b. devonian c. cambrian d. silurian

Which flexible structure that supports the nerve cord and led to the backbone

Food provides molecules that serve as fuel and building material for all organisms. plants undergo photosynthesis and make their own food. other organisms, like us and the horse seen above, are consumers and eat food. how do all organisms use food as fuel? be sure to include the name of the process in your answer. me.

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.