1.
which of the following would differ if you compared the same reaction taking place with and without an enzyme? (1 point)

the chemical energy of the reactants
the chemical energy of the products
the energy required to start the reaction
the overall energy of the reaction

2.
which of the following would occur if cells did not have enzymes? (1 point)

cells would not have any chemical reactions taking place.
cells would have some chemical reactions, but not enough to support life processes.
reactions in cells would be too slow to sustain life.

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

In eukaryotes, genetic information is passed to the next generation by processes that include mitosis or meiosis. which of the explanations identifies the correct process and supports the claim that heritable information is passed from one generation to another? a. mitosis, followed by cytokinesis, produces daughter cells that are genetically different from the parent cell, thus insuring variation within the population. b. during mitosis, dna replication occurs twice within the cell cycle to insure a full set of chromosomes within each of the daughter cells produced. c. in asexual reproduction, a single individual is the sole parent and passes copies of its genes to its offspring without the fusion of gametes. d. single-celled organisms can fuse their cells, reproducing asexually through mitosis to form new cells that are not identical to the parent cell.

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.