Although we think of land when we hear the word biome, there are also aquatic biomes. The abiotic factors that influence life forms vary with location within ocean systems. Oceanographers divide the ocean into five broad
vertical zones as seen in the chart above. Compare the abiotic characteristics of the five zones.
Although we think of land when we hear the word biome, there are also aquatic biomes. The abiotic factors that
influence life forms vary with location in the ocean. Oceanographers divide the ocean into five broad vertical zones as
seen in the chart. Compare the abiotic characteristics of the five ocean zones. Which of these conclusions about life
forms found in the zones is supported by the information in the chart?
)
A)
Because of the severe abiotic conditions, there are no life forms found in
the hadalpelagic zone.
B)
The epipelagic zone is the only zone of the five zones where visible light
and algae can be found.
The mesopelagic zone hosts a diverse zooplankton community instead of a
phytoplankton or algae community and virtually no fish species.
Because there is no light in the abyssal zone, organisms feed on each other
or the dead organic material, detritus, that falls into the abyssal zone from
above.
D)

Rease is an enzyme used by plants to break down urea (a nitrogen-containing compound) into carbon dioxide and ammonia. urease urea > > > carbon dioxide and ammonia ammonia is broken down by plants into a nitrogen source plants need to grow. thus, plants could not use urea as a nitrogen source unless it was first converted to ammonia. in soybean plants there are two different kinds of urease, one produced in the seeds and the other produced in the leaves of the plant. three types of soybean plants were used in a set of experiments: normal soybeans and two mutant strains, one lacking the urease in the seeds only (strain 1) and one lacking urease in the leaves only (strain 2). experiment 1 separate areas in a field were planted with normal, strain 1, and strain 2 soybeans. all types of soybeans appeared to grow, flower, and produce seeds equally well. there were no externally detectable differences among the strains. experiment 2 small pieces of plant leaves of equal weight were obtained from each type of soybean plant and separately placed on media in culture dishes. tissue growing in this way will become an unorganized clump of cells referred to as callus. to provide a controlled nitrogen source, half the tissue samples of each type were placed on media containing urea, and the other half of the samples were placed on media containing ammonia. after 30 days, the weight gain for each of the callus samples was determined. results are shown in the table below.