Which of the following are examples of homologous structures?
A. Whale flipper and cat leg
B. Human eye and octopus eye
C. Bird and insect wings
D. Body shape of sharks and dolphins
E. Penguin wing and fish fin
Answer: A
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Which statement is TRUE of two separate regulators controlling one individual operon?
A) The two regulators themselves must respond to different signals, which enables both to control the operon differently. B) One regulator will likely control the transcription of one section of the operon, whereas the other regulator will control the other component. C) One regulator will bind to the operator region whereas the other will bind to the promoter region so they can co-occur and co-regulate the operon. D) Two regulators trying to control the same operon will likely result in only one being maintained after several generations.
The mutated gene that causes cystic fibrosis is ____
a. CFTR b. CRFT c. CTFR d. CRTF e. CFRT
Each end of a long bone is called ____
a. the diaphysis b. the epiphysis c. the shaft d. compact bone e. canaliculi
What are animals trapped and digested by "carnivorous" plants such as the cobra lily used as?
a. primarily as an energy supplement during winter months b. primarily as a carbon source for the plant c. primarily as a nutrient supplement in nutrient-deficient environments d. primarily as food for bacteria and fungi that grow symbiotically with the plant roots