Preserved footprints left behind by animals are called ichnites.
I'm not sure but I think the answer is A. Plants. Then again I'm not 100% sure that this is correct
Answer:
See Explanation
Explanation:
1: Seeds provide a protective coat so that the plant can develop when it finds nice soil.
2: Seeds have pre-packaged foods sources.
3: Seeds are very easily dispersed by animals, wind, water, ect...
4: Seeds have the capability to survive without water.
The answer is B because the humoral immune response is mediated by antibody