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facultative parasite
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Battle of the Alamo from "Texas: An Epitome of Texas History from the Filibustering and Revolutionary Eras to the Independence of the Republic, 1897. Texas Revolution, Texas revolt, Texas independence, Texas history.
6 Wars of Independence
July, 2006, Launch of Space Shuttle Discovery STS-121. See attached for full caption information.
Will Light-Speed Space Travel Ever Be Possible?
Hemp (Cannabis sativa).
9 Mind-Altering Plants
Lusitania sinking, illustration from The War of the Nations (New York), December 31, 1919. World War I, WWI. This image is one of three on the page. (See source file for the other two.)
7 of the World’s Deadliest Shipwrecks
Titanic infographic. The 30th anniversary of its discovery is September 1, 2015. SPOTLIGHT VERSION.
Timeline of the Titanic’s Final Hours
King Cobra snake in Malaysia. (reptile)
9 of the World’s Deadliest Snakes
Small, white rat (genus Rattus) on a glass table. (rodent, laboratory, experiment)
Cruel and Unusual Punishments: 15 Types of Torture

facultative parasite

biology

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parasitic plants

  • Dodder flowers
    In parasitic plant: Host dependence

    …requirement for a host, whereas facultative parasites can live and reproduce in the absence of a host. All holoparasites are, by definition, obligate. Even though hemiparasites are photosynthetically competent, some species nevertheless are obligate in terms of their reliance on a host for their reproduction.

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