Frozen water (ice) has less density than liquid water.
how does this property of water affect life on earth?
a. ice floats on the surface, sustaining life at the bottom of lakes and oceans.
b. ice floats on the surface, animals migrate over lakes and bays.
c. ice floats on the surface, maintaining sub–zero temperatures at the bottom of lakes and oceans.

During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water

Which is an example of a decomposer? a. bear b.algae c.grass d.bacteria d bacteria

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.