Cell Biology Review

What characteristics do ALL cells have in common?

A scientist observes a cell that is surrounded by a cell wall and lacks a nucleus and membrane-bound organelles. What can the scientist conclude about the cell?

Loriciferans are microscopic multicellular animals that live in various marine sediments. Scientists have discovered genera of Loriciferans in a deep-sea habitat that lacks oxygen. Before this discovery, some prokaryotes and some unicellular eukaryotes were known to inhabit anaerobic environments. Among the newly discovered Loriciferans is Spinoloricus sp. nov., which is pictured below. Scientists determined that organisms of the genus Spinoloricus were eukaryotes and not prokaryotes because Spinoloricus cells have —

The simplicity of prokaryotic cells prevent them from

Which of these describes a difference between viruses and cells?

The correct organization of life is:

Yellow fever, encephalitis, and measles are diseases in humans. The disease-causing agents take over the machinery of the cells and use it to reproduce. Based on this information, the agents that cause these diseases are which of the following?

Four students attempted to classify organisms into the Plant and Animal kingdoms. Their classifications are shown in the table below. Which student’s classification correctly separates organisms into these two kingdoms?

The organization of living systems begin with atoms-molecules-organelles-cells-tissue-organ-organ system-organism. Which of the following organisms has the simplest cellular structure?

A scientist is studying gene expression in a prokaryote. Which of the following organisms could the scientist be studying?