Microcystis aeruginosa is a species of cyanobacteria. What CANNOT be true of this species?
A. It uses ammonia to produce proteins.
B. Its cells contain an extensive thylakoid.
C. It synthesizes organic molecules.
D. It is an obligate anaerobe.
E. It secretes mucilage.
Answer: D
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The parents-to-be were shocked when an ultrasound scan done in the second trimester of the pregnancy showed a fetus with obviously broken leg bones and ribs. The doctor diagnosed osteogenesis imperfecta. This is caused by a mutation in a gene that encodes
A) beta globin. B) a clotting factor. C) myosin. D) collagen.
Variations in the timing of master gene expression during embryonic development in vertebrates is responsible for
____.
a. mitochondrial DNA expression b. protein synthesis c. differences in adult body form d. development of vestigial structures e. brain development
____ is a systemic infection associated with microorganisms multiplying in circulating blood
Fill in the blank(s) with the appropriate word(s).
What is the correct unit of measurement for the size of most viruses?
a. picometers b. nanometers c. micrometers d. centimeters e. decimeters