This is a model to students understand the process of photosynthesis, which allows plants to create their own food. the greatest limitation of this model is that a) the roots are visible in the model. b) the cellular structure of the plant is not included. c) the comparative size of the plant and the sun are inaccurate. d) it is incomplete and does not show all reactants and products.

What is the difference between an igneous, sedimentary and metamorphic rock

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

Consider the following reaction: 2h2 + o2 —> 2h2o a) what are the reactants in this reaction? b) what are the products in this reaction? c) how many molecules of oxygen are used in this reaction?