The definition of lysogeny is
A) phage DNA is incorporated into host cell DNA.
B) lysis of the host cell due to a phage.
C) the period during replication when virions are not present.
D) when the burst time takes an unusually long time.
E) attachment of a phage to a cell.
A
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In plants, most chloroplasts are inherited from the maternal plant because maternal gametes contribute the most __________ to the zygote.
A. cytoplasm B. mitochondria C. ribosomes D. chlorophyll E. cytoplasm and mitochondria
A deficiency of T-helper cells would affect both cell-mediated immunity as well as antibody production.
Answer the following statement true (T) or false (F)
Aerobic cellular respiration requires the use of
A. N2. B. O2. C. H2. D. H2O.
A researcher hypothesizes that crocodile gender is determined by the incubation temperature of the egg. The hypothesis states that an average nest temperature of 32-33°C results in the birth of male crocodiles while cooler and higher incubation temperatures result in female crocodiles.Researchers find a group of crocodiles in which an expanded incubation temperature gives rise to male crocodiles. This particular group of crocodiles hatch male crocodiles even with incubation temperatures as low as 29°C. What type of scientific approach has led to this observation?
A. hypothesis testing B. discovery-based science