The letters in the diagram below represent index fossils
what is one possible explanation as to why index fossil t and the rock layer that it is associated with does not appear in rock layers #1?
a.) erosion occurred
b.) there is no explanation
c.) it was subducted and melted into magma
d.) too much sedimentation above the fossil crushed it

the right answer is a. skin cells forming from sunlight.

the liver is an organ endowed with a fantastic ability to regenerate

. thus, if a hepatectomy (ablation) of 70% of the hepatic mass is performed in the rat, there is complete recovery in 7 to 10 days.

prokaryotes are beings that have existed since the existence of life on earth, and do not come from another realm.

ribosomes are organelles that exist naturally in eukaryotes, either in free form or attached to the endoplasmic reticulum.

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regents of the university of california v. bakke, 438 u.s. 265 (1978), was a landmark decision by the supreme court of the united states. it upheld affirmative action, allowing race to be one of several factors in college admission policy.