Which cells form a type of vascular tissue by joining end to end in tubelike columns, develop thick, lignified cell walls, and die at maturity, thus leaving an open-ended, water-conducting tube?

a. tracheids
b. vessel members
c. parenchyma cells
d. collenchyma cells


Ans: b. vessel members

Biology & Microbiology

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If a set of genes is repressed in the presence of the controlling substance, it is referred to as ________ control.

Fill in the blank(s) with the appropriate word(s).

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Answer the following statement true (T) or false (F)

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