A woman with type AB blood and a man with type O blood have a child. Which type of blood could the child have?
A) type A or type O
B) type B or type O
C) type AB or type O
D) type A or type B
D
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When is it believed that sponges evolved?
a. 3.2 billion years ago b. 1.2 billion years ago c. 870 million years ago d. 650 million years ago e. 420 million years ago
A scientist discovers an unidentified organism that is composed of multiple cells and has a membrane-bound nucleus. Of the choices listed, the most likely classification would be ________
A) Archaea B) Bacteria C) fungi D) Any of the above could be correct.
Extracellular glucose inhibits transcription of the lac operon by _____
A) strengthening the binding of the repressor to the operator B) weakening the binding of the repressor to the operator C) inhibiting RNA polymerase from opening the strands of DNA to initiate transcription D) reducing the levels of intracellular cAMP
Which of the following is NOT a goal of recombinant DNA technology?
A) combining genetic material from more than one organism to produce new useful organisms B) making it possible to clone humans C) eliminating undesirable traits from livestock or crops D) being able to remove or correct damaging traits in humans E) creating organisms capable of producing useful products