Question

multiple choice 10 points which of the following statements about the nitrogen cycle is not true? save is: animals get nitrogen by eating other plants or animals; plants create nitrogen in their roots; nitrogen moves back and forth between the atmosphere and living things; the air we breathe is mostly nitrogen

multiple choice 10 points how does phosphorus move from the biotic to the abiotic areas during its cycle? save is: primary consumers eat producers; secondary consumers eat primary consumers; bacteria on plant roots transfer it; decomposers break down the remains of producers and consumers

multiple choice 10 points which of the following processes in the water cycle involves the changing of liquid water into water vapor? save is: condensation; precipitation; evaporation; infiltration

Explanation:

Question 5 (Nitrogen Cycle)

• Animals get nitrogen by consuming other organisms (plants/animals) as they obtain organic nitrogen compounds, so this is true.
• Plants cannot "create" nitrogen in their roots. They rely on nitrogen - fixing bacteria (in root nodules for legumes) or absorb nitrogen in the form of nitrates/ammonium from the soil. So this statement is false.
• Nitrogen cycles between the atmosphere (as $N_2$) and living things (through processes like nitrogen fixation, assimilation, etc.), so this is true.
• The air we breathe is about 78% nitrogen, so this is true.

• Primary consumers eating producers (option A) and secondary consumers eating primary consumers (option B) are about the transfer of energy and organic matter in the food chain, not the transfer of phosphorus from biotic to abiotic areas.
• Bacteria on plant roots (option C) are mainly involved in nitrogen fixation (for nitrogen cycle) or mycorrhizal associations for nutrient uptake, not phosphorus transfer from biotic to abiotic.
• Decomposers break down the remains of producers and consumers (biotic components). When they decompose these remains, the phosphorus in the organic matter is released back into the soil (abiotic area) in an inorganic form. So this is how phosphorus moves from biotic to abiotic areas.

• Condensation is the process of water vapor turning into liquid water (e.g., cloud formation), so it's not the right process.
• Precipitation is the process of water (in liquid or solid form like rain, snow) falling from the atmosphere to the Earth's surface, so it's not the right process.
• Evaporation is the process by which liquid water changes into water vapor (gas) due to heat (usually from the sun). This matches the description in the question.
• Infiltration is the process of water seeping into the soil from the surface, and it doesn't involve the change of liquid water to water vapor.

Answer:

B. plants create nitrogen in their roots

Question 6 (Phosphorus Cycle)