Which of the following is not true of measles?
A. It causes cell membranes to fuse to form syncytia.
B. It is a single-stranded nonenveloped RNA virus.
C. Its causative agent is a member of the Morbillivirus genus.
D. It is transmitted by respiratory droplets.
E. It is in the Paramyxovirus family.
Answer: B
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Cardiac muscle cells are connected by special junctions called intercalated discs. Intercalated discs provide strength between cells of tissues which exhibit high mechanical stress, strong flexible connections between tissue cells, and electrical excitability between the cells. Using this information, which junctions are present in intercalated discs?
A. Tight, plasmodesmata, and desmosomes B. Adherens, tight, and gap C. Gap, desmosomes, and hemidesmosomes D. Gap, adherens, and desmosomes E. Tight, plasmodesmata, and adherens
The deuterostomes are animals whose
(a) stomach is in front of the crop. (b) mouth is covered by a fleshy lip. (c) blastopore becomes the anus. (d) digestive tract is lined by mesoderm.
Red blood cells are
(a) erythrocytes. (b) leukocytes. (c) platelets. (d) all of the above.
If an organism inherits two recessive alleles, the phenotype of this organism will look like which of the following?
a. the dominant allele b. the recessive allele c. both the dominant and recessive allele d. neither the dominant or recessive allele