Which of the following statements best describes secondary endosymbiosis?

A. A host cell manufactures its own symbiont and later acquires another one by phagocytosis.
B. A host cell ingests another cell already containing a primary symbiont.
C. A host cell ingests two or more symbionts simultaneously.
D. A host cell ingests one symbiont and then later ingests another one.
E. All of the other choices provided are incorrect.


B. A host cell ingests another cell already containing a primary symbiont.

Biology & Microbiology

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written as 46,XX,t(18q). What will be an ideal response?

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Caspases are produced as inactive precursors known as ________

Fill in the blank with correct word.

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Common forms of air pollution include smog, acid rain, greenhouse gases, and particulates. What is the main source of these pollutants?

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