Lichens are composed of a symbiosis of fungi and which of the following?

A) green algae
B) cyanobacteria
C) euglenoids
D) cyanobacteria or green algae
E) euglenoids or dinoflagellates


D

Biology & Microbiology

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The formation of a D-loop is associated with which of the following models of recombination?

A. Double-stranded break model B. Holliday model C. Single-stranded break model

Biology & Microbiology

The bundle sheath typically surrounds the larger veins

____________________ Indicate whether the statement is true or false.

Biology & Microbiology

When ocean levels dropped about 70 million years ago, marsupial mammals moved into North America and displaced many of the placental mammal species

a. true b. false

Biology & Microbiology

Which of the following statements about the two strands of a DNA molecule is true?

A) The strands are connected to each other by sugar-phosphate bonds. B) The strands are a pair of sister chromatids. C) The strands have identical base sequences. D) An A base on one strand always pairs with a G base on the other strand. E) A T base on one strand always pairs with an A base on the other strand.

Biology & Microbiology