High levels of certain plant nutrients in runoff can lead to rapid growth of algae (an algal bloom) in aquatic ecosystems. These algal blooms are generally followed by algal death and decomposition, which consumes large
amounts of dissolved oxygen in the water and results in oxygen levels insufficient to support aerobic respiration.
This process is known as eutrophication. The amount of algae present in a body of water can be estimated from the
amount of chlorophyll a in a sample of the water. A researcher studying eutrophication collected samples at
different times of the year in a freshwater ecosystem. The samples were analyzed for total nitrogen and chlorophyll
a concentration (Figure 1) as well as total phosphorus and chlorophyll a concentration (Figure 2).

c

explanation:

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project