The endodermis

(a) is the outer covering of the root.
(b) is part of the vascular tissue.
(c) contains the Casparian strip, which regulates the movement of substances.
(d) is none of the above.


(c) contains the Casparian strip, which regulates the movement of substances.

Biology & Microbiology

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The intercellular spaces between plant cells

(a) contain air. (b) are responsible for cytoplasmic streaming. (c) produce energy for the cell. (d) contain chloroplasts.

Biology & Microbiology

Ecdysone and juvenile hormone regulate molting and ____________ in insects.  

A.  metamorphosis B.  sexual behavior C.  body shape D.  egg production

Biology & Microbiology

Which type of plant hormone governs senescence in plants, such as the loss of leaves in autumn by

some plants?

a. cytokinins b. abscisic acid c. gibberellins d. brassinosteroids e. ethylene

Biology & Microbiology

Most flowering plants maximize their ability to take up nutrients by taking part in mutualisms with fungi. These

mutualisms are called ____.

a. root nodules b. Rhizobium c. mycorrhizae d. legumes e. endodermal associations

Biology & Microbiology