Which layer of the extracellular matrix of a plant provides the greatest strength?

A. the middle lamella
B. the primary cell wall
C. the secondary cell wall
D. the plasma membrane


C

Biology & Microbiology

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Compare a pseudocoelom to a coelom.

A. A coelom is completely enclosed by mesoderm whereas a pseudocoelom has an outer covering of mesoderm and an inner one of endoderm. B. A pseudocoelom is completely enclosed by mesoderm whereas a coelom has an outer covering of mesoderm and an inner one of endoderm. C. The coelom is enclosed by ectoderm and the pseudocoelom is enclosed by endoderm. D. The pseudocoelom is enclosed by ectoderm and the coelom is enclosed by endoderm. E. The coelom is enclosed by ectoderm and the pseudocoelom is enclosed by mesoderm.

Biology & Microbiology

The enzyme that modifies the mannose group on lysosomal proteins recognizes and binds to a(n)

a. helix. b. signal sequence. c. signal patch. d. KDEL sequence.

Biology & Microbiology

Cercariae, metacercaria, redia, and sporocysts are all life cycle stages of trematodes

Indicate whether the statement is true or false

Biology & Microbiology

When was the first documented case of HIV in the United States?

A. 1959 B. 1924 C. 1969 D. 1884 E. 1982

Biology & Microbiology