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 sun's light combined with the visible wavelenghts form what is called ultraviolet radiation, which are the long waves at the end of a visible light sprectrum.

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bioteacher101

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these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.