Which of the following is NOT a unifying characteristic of diplomonads and parabasalids?

A) having flagella
B) lacking chloroplasts
C) lacking mitochondria
D) being multicellular


Answer: D

Biology & Microbiology

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Immunoglobulins and TCRs associate with adaptor molecules that have

A) a C domain. B) immune-based tyrosine-activation motifs (ITAMs). C) pathogen recognition receptors. D) toll-like receptors.

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Polyplacophora, Gastropoda, Bivalvia, and Cephalopoda are all lineages within the phylum

a. Rotifera. b. Mollusca. c. Platyhelminthes. d. Annelida. e. Nemertea.

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how many oncogenic viruses have been discovered in humans?

What will be an ideal response?

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   Trait  SpeciesABCDE100100210101310101411100511110611110The table shows the distribution of traits (A-E) in six extant species (1-6). A "0" indicates the ancestral condition, and a "1" indicates the derived condition. Which pair of species shares the fewest number of derived characters (synapomorphies)?

A. 6 and 3 B. 1 and 6 C. 4 and 6 D. 1 and 4 E. 2 and 3

Biology & Microbiology