*DOES NOT MATTER WHAT YOU ANSWER* Many different microscopic organisms can be found in pond ecosystems, including the three organisms shown in the diagrams below. The primary cellular structures in each of these single-celled organisms are labeled in the diagram. Some of the structures are common to all three organisms and other structures are not. One of the three organisms below can obtain energy through photosynthesis.

a. Based on the diagrams, identify which organism is able to perform photosynthesis. Explain your reasoning.

b. Identify the two reactants for photosynthesis.

c. At times, this photosynthetic organism can switch to being heterotrophic. Describe a condition that would favor this organism being heterotrophic. Explain your answer.

Answer using 2 to 3 complete sentences for each question.

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol

Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?

In 1959, doctors began using the powerful antibiotic methicillin to treat infections of staphylococcus aureus, but within two years, methicillin-resistant strains of s. aureus (mrsa) appeared. how did the resistant strains of s. aureus emerge? in 1959, doctors began using the powerful antibiotic methicillin to treat infections of staphylococcus aureus, but within two years, methicillin-resistant strains of s. aureus (mrsa) appeared. how did the resistant strains of s. aureus emerge? staphylococcus aureus bacteria that were able to synthesize cell walls using a protein that was not affected by methicillin survived the methicillin treatments and reproduced at higher rates than did other individuals. over time, these resistant individuals became increasingly common. in response to treatment of staphylococcus aureus infections with methicillin, some bacteria began to synthesize cell walls using a protein that was not affected by methicillin. these bacteria survived the methicillin treatments and reproduced at higher rates than did other individuals. over time, these resistant individuals became increasingly common. in response to treatment of staphylococcus aureus infections with methicillin, bacterial populations gradually began to synthesize cell walls using a protein that was not affected by methicillin.