Which of the following is not an example of active immunity?
A) passing of antibodies from a mother to an infant during breastfeeding
B) a vaccination against seasonal flu
C) antibodies created in response to exposure to bacteria
D) cytotoxic T cells created in response to a virus
A
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The SOS system repairs DNA that has gaps, breaks, and other lesions by
A) cutting DNA from other parts of the genome and pasting it into the gaps or damaged areas. B) stabilizing single-stranded DNA until the next round of normal replication. C) using specialized DNA polymerases that will synthesize a new DNA strand even if there is not a normal complementary DNA strand to act as a template. D) using available mRNA and a special RNA-dependent DNA polymerase to fill in the gaps and replace damaged DNA.
Similar to animal cells, cells in some plant organs, such as leaves, flowers, and fruits, undergo ____ growth
a. determinate b. indeterminate c. lateral d. apical e. plastic
Mangrove forests predominantly occur in temperate regions
Indicate whether the statement is true or false
Relatives of modern ____ and horsetails were the dominant plants during the Carboniferous period
a. club mosses b. peat mosses c. ferns d. liverworts e. hornworts