Which of the Following Statements About Dark Matter in the Galaxy

question 19

Multiple Choice

Which of the following statements about dark matter in the Galaxy is FALSE?

• A) Most of it cannot at present be observed with our telescopes (we only know its existence from the gravity it exerts)
• B) While the dark matter cannot be observed with our present-day instruments, we still have a pretty good idea what it consist of
• C) Our measurements suggest that there may be as much as ten or twenty times more dark matter in the Galaxy than the matter we have been able to observe
• D) Dark matter appears to be distributed in a giant halo (outer layer) around the Galaxy
• E) We can pretty much rule out the idea that the dark matter is made mainly of vast clouds or regions of hydrogen gas

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Definitions:

Adventitious Roots

Roots that grow from an unusual place, such as from a stem or leaf, often helping in the propagation and support of plants.

Tracheids

Long, thin cells found in the xylem of vascular plants, serving as basic water-conducting elements and structural support.

Vessel Elements

are elongated cells found in the xylem of plants, facilitating water transport.

Sclerenchyma Fibers

Thick-walled, rigid cells that provide structural support to plants, often found in stems, leaves, and roots.