Very rapid speciation occurred when cichlid fishes were isolated in Lake Victoria. Widespread extinction was dramatically seen when
A. artificial selection stopped.
B. predatory fish were added.
C. hybridization stopped.
D. fishing was prohibited.
E. insect larvae stocks were depleted.
B. predatory fish were added.
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Compared to cnidarians, bilaterally symmetrical animals have _____ nervous systems
A. simple B. compound C. specialized D. no
Newborn infants can be infected with Group ________ streptococcus during birth.
Fill in the blank(s) with the appropriate word(s).
When a species is introduced into a habitat that is not its natural ecosystem, the species could become "invasive." Which of the following is NOT a characteristic of an "invasive" species?
a) invasive species will spread very quickly through a habitat b) invasive species will outcompete the native species for resources c) invasive species are often introduced either accidentally or purposely by humans d) invasive species never have negative effects on a new habitat's biodiversity e) invasive species can lead to the extinction of other native species
Only the nervous and endocrine systems are involved in homeostasis.
Answer the following statement true (T) or false (F)