Heartwood and sapwood consist of _____

A) periderm
B) secondary xylem
C) secondary phloem
D) cork


B

Biology & Microbiology

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The abundance of cyanobacterial mats has greatly declined due to the evolution of

A) antimicrobial-producing fungi. B) bacteriophages. C) metazoan grazers. D) Proteobacteria.

Biology & Microbiology

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

Genetic heterogeneity refers to mutations in different genes that cause the same symptoms.

Biology & Microbiology

When does gene expression occur?

a. when a gene is turned on to produce RNA b. when a gene is turned on to produce DNA c. when a gene is turned on to begin the cell cycle d. when a gene is turned on to begin the process of apoptosis

Biology & Microbiology

Which protist group typically consists of amoeboid cells surrounded by a hard outer shell through which cytoplasmic

projections extend? a. rhizarians b. unikonts c. euglenoids d. archaeplastids e. opisthokonts

Biology & Microbiology