Please Use the Following Information to Answer the Questions Below

question 5

Multiple Choice

Please use the following information to answer the questions below.
A scientist conducts an experiment to quantify the effect of mycorrhizae and soil nitrogen levels on plant growth in a grassland.The experiment has four treatments: (1) mycorrhizae present and ambient levels of nitrogen, (2) mycorrhizae present and nitrogen added, (3) mycorrhizae absent and ambient levels of nitrogen,and (3) mycorrhizae absent and nitrogen added.After four weeks,the scientist removes the aboveground plant material for weighing.
Figure 42.4
-What is the dependent variable in the experiment shown in Figure 42.4?

• A)net primary productivity
• B)total biomass of heterotrophs
• C)net secondary productivity
• D)total biomass of autotrophs

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Definitions:

Low-Ranking Males

Male individuals positioned at the lower end of a social hierarchy, often having less access to resources and mating opportunities.

Reproductive Variance

Differences in reproductive success among individuals within a population, often influencing evolutionary outcomes.

Sexual Dimorphism

The difference in appearance between males and females of the same species, such as differences in size, color, or structure.

Reproductive Skew

A measure in social species describing how reproductive opportunities are distributed among group members, often unevenly.