Heartwood and sapwood consist of _____
A) periderm
B) secondary xylem
C) secondary phloem
D) cork
B
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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.
Answer the following statements true (T) or false (F)
Genetic heterogeneity refers to mutations in different genes that cause the same symptoms.
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
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