The fossil evidence found in these sedimentary layers best implies that a) land plants are older than land animals. b) vertebrates and invertebrates evolved together. c) invertebrates lived on earth before vertebrates. d) land animals evolved at the same time as marine animals

answer: c). invertebrates lived on earth before vertebrates.

the invertebrates are the organisms which lack a particular vertebral column. these animals were living in aquatic habitat undergone a series of adaptations in the course of evolution. they increased the range of habitat from aquatic to land. these invertebrates undergone several adaptations to transform into vertebrate organisms which have proper vertebral column. the development of features from invertebrates to vertebrate transformation can be observed in fossils found in sedimentary layers.

the right side of the picture going down is:

polymerase

protein

transport vesicle

modified protein

the left side of the picture going down is:

dna helix

single-stranded rna

endoplasmic reticulum

ribosome

golgi apparatus

protein released from vesicle

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explanation:

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