According to cell theory, ____
a. all organisms are multicellular
b. all cells come from preexisting cells
c. DNA is the structural and functional unit of life
d. all cells are approximately the same size
e. proteins are the genetic material of cells
ANSWER: b
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A temperate phage
A. may be lysogenic. B. may be lytic. C. enters a lysogenic or lytic life cycle shortly after entering the host cell. D. are all RNA viruses. E. may be lysogenic AND enters a lysogenic or lytic life cycle shortly after entering the host cell.
Where does karyogamy occur in basidiomycetes?
a. basidia b. conidiophores c. sporangia d. asci e. zygospores
Which of the following is NOT a line of evidence that Kingdom Animalia is a monophyletic group?
a. The ribosomal RNA of animals is more similar to that of other animals than it is to any other form of life. b. Animals share unique similarities in their cell-to-cell junctions. c. All animals have the same genetic code. d. Animals share similarities in the molecules in their extracellular matrices. e. All animals have bilateral symmetry.
All of the following statements regarding congenital anomalies are true, EXCEPT
A. Congenital anomalies are within the top 10 causes of death for humans under age 24, and within the top three for humans under 14yo. B. Congenital anomalies may be genetic, environmental, or a combination of the two. C. Most congenital anomalies are purely genetic in origin. D. This term includes malformations, deformations, disruptions, syndromes, sequences, and associations. E. This term is synonymous with "birth defects" and "congenital malformations."