It is important to remember that there are multiple types of eukaryotes. All eukaryotes have a plasma membrane, ribosomes, and cytosol since these are fundamental organelles necessary for basic cellular function. Plant and fungi cells, which are eukaryotic, also possess cell walls. Thus, the answer is "none of the other answer choices."

Like other eukaryotes, fungal cells contain a membrane bound nucleus with chromosomes. They also possess membrane bound cytoplasmic organelles such as ribosomes and mitochondria. A prokaryote is a single celled organism that lacks a membrane bound nucleus, mitochondria, or any other membrane bound organelles.  

Obligate organisms require a certain environment in order to survive. Facultative organisms have a preference but can usually survive multiple environments. Therefore, a bacteria that requires an oxygen-free environment is an obligate anaerobe. Obligate anaerobes are microorganisms that are killed by normal atmospheric concentrations of oxygen.

Bacteria are prokaryotes, not eukaryotes. Eukaryotes have membrane-bound organelles and an enclosed nucleus. “Mitochondria” is incorrect and it refers to an organelle in eukaryotes. Muscle cells in humans and plant cells are also eukaryotic cells.

Eukaryotes and prokaryotes are distinguished based on a structure called the nucleus. Eukaryotes have a nucleus, which houses their genetic material. Prokaryotes do not have a nucleus; instead their DNA is localized in an area (i.e. it is not membrane bound). So if the researcher were to stain a sample containing both types of cells, the eukaryotic cells would have darker, more defined stains within their cells. This would indicate the presence of a more compacted and localized DNA than that found in prokaryotes.

Both eukaryotic and prokaryotic cells have cell membranes. However, the prokaryotic cell membrane is surrounded by a cell wall. Prokaryotes have circular DNA, whereas eukaryotic DNA is in chromosomes and bound by histone proteins. Prokaryotes do not have membrane-bound organelles (endoplasmic reticulum, mitochondria, chloroplasts, Golgi bodies, nucleus). Prokaryotic ribosomes are smaller (70s) than eukaryotic ribosomes (80s).

Plant cells are very similar to animal cells, but receive energy from sunlight. As a result, they require chloroplasts in order to house the chlorophyll where photosynthesis takes place. Animal cells are incapable of photosynthesis, and do not contain chloroplasts.

The other listed structures are found in both animal and plant cells.

Both plant and animal cells contain a nucleus, endoplasmic reticulum, and cell membrane. Plants and animals are both eukaryotic, meaning they have the ability to house membrane-bound organelles.

Chloroplasts are required for producing chlorophyll from sunlight. Animals are incapable of performing photosynthesis because they lack these structures; only plant cells and certain protists contain chloroplasts. Additionally, all plant cells contain vacuoles, while only a subset of animal cells do.

Mitochondria are membrane-bound organelles found in both plant and animal cells, and provide energy for the cell by converting different forms of reactants into ATP. The cell membrane is present in both types of cells and separates the environment from the inside of the cell, and provides cell structure and protection. The rough endoplasmic reticulum is present in both types of cells and is responsible for the storage and packaging of proteins and vesicles. The nucleus is present in both types of cells and controls the general activities of the cell, including gene expression and cell division.

Of these answer choices, only chloroplasts are present in plants cells, but not animal cells. Plant cells are photosynthetic and create their own form of energy from sunlight. The photosynthesis occurs in the chloroplasts of plant cells, which contain the pigment chlorophyll.

Chlorophyll is a pigment found in chloroplasts of plant cells. The electrons of chlorophyll become excited by certain wavelengths of light, and can use this energy to create chemical bonds. This process is known as photosynthesis. The net result of photosynthesis is the conversion of electromagnetic waves (light) to chemical energy (sugar).

Wavelengths that correspond to green light are not used by chlorophyll, and are not absorbed by the pigment. Green light is reflected back from the leaves of the plant, and absorbed by the eyes of an observer. This is what makes leaves look green.