Describe archae
What will be an ideal response?
-ancient bacteria
-live in extreme environments like polar caps, boiling springs, deserts
-prokaryotic
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The lacZ and lacY genes are transcribed when:
A. lactose is present, regardless of the level of glucose in the cell. B. lactose is absent and glucose levels are high. C. lactose is present and glucose levels are low. D. glucose levels are high and lactose levels are low. E. glucose levels are low, regardless of the level of lactose in the cell.
. Imagine that you have been bitten by a poisonous snake with neurotoxic venom. Thankfully, you are rushed to the emergency room of a local hospital, where you receive antivenom. Your condition subsequently returns to normal. Before your release, your physician chastises you for not being more careful. He informs you that you were within minutes of not being able to breathe as the result of the venom's effect on the nervous control of your breathing. As a biology student, you consider this carefully, and hypothesize that your breathing would have stopped because the venom would cause
A. your trachea to collapse. B. your lungs to collapse. C. your diaphragm to become inactive. D. your blood to lose oxygen.
Four of the five bones listed below are parts of the
same skeletal division. Select the exception. a. cranium b. ribs c. sternum d. vertebrae e. phalanges
The ________ represents the sporophyte generation of a conifer, and the ________ produces gametophytes
A) cone; tree B) tree; cone C) tree; pollen D) seed; tree