Bryophytes are the only group of land plants that produce swimming sperm
A. true
B. false
B
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Which of the following atmospheric gas is changing the global climate?
A. ozone B. water vapor C. carbon dioxide D. hydrogen E. oxygen
Which association is NOT correct?
Select one: a. Periodontitis is a loss of bone and loosening of teeth that occurs in old age. b. Gingivitis is an inflammation of the gums that can spread to the periodontal membrane. c. The loss of 20 deciduous teeth is a natural process that occurs as a child. d. Tooth decay or dental caries is a natural erosion of teeth from wear and tear. e. Tonsillitis is an inflammation of the tonsils.
The polynucleotide strands of DNA are linked along their length by ________ bonds between the bases.
A. covalent B. Van der Waals C. ionic D. hydrogen E. double
Gene regulation in eukaryotes is more complicated than bacterial gene regulation. Which of the following describes a gene regulation event that occurs in eukaryotes but not in bacteria?
A) In eukaryotes, mRNA does not need to be modified. B) In eukaryotes, transcription and translation occur in the same cellular compartment. C) In eukaryotes, histones must be added or removed to regulate gene expression. D) In eukaryotes, mRNA degrades quickly compared to bacterial mRNA that is more stable. E) In eukaryotes, proteins are post-translationally modified, whereas bacterial proteins are never post-translationally modified.