Guard cells control their volume, and thus size:
A. by increasing the amount of solutes such
as K+ and Cl-.
B. by reducing the amount of solutes such as
K+ and Cl-.
C. by increasing the amount of water in the
cells without changing solute concentration.
D. by decreasing the amount of water in the
cells without changing solute concentration.
E. by increasing the amount of CO2 in the
cells.
A
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Which of the following would most likely result in a bottleneck event?
A. A small population of geese migrates and joins a large flock of the same species. The two groups subsequently begin interbreeding. B. A mutation occurs in an individual poison ivy plant, doubling the number of seeds it produces. The mutation is inherited by future generations. C. A hurricane blows through a coastal swamp inhabited by an apple snail population. The hurricane drastically changes the hydrology of the swamp, killing 98% of the apple snails. D. A population of broomsedge grass is studied and determined to be in Hardy-Weinberg equilibrium. E. Two populations of lizards were separated for many years by a river. The river's course has been diverted and migration between the two lizard populations can now occur.
. 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.
Hormones produced by the endocrine system regulate blood volume and blood cell formation.
Answer the following statement true (T) or false (F)
13. In order to properly evaluate scientific research conclusions, one should utilize critical thinking by _____
determining the reliability of the source of the data reading about the research methods and protocols used trying to come up with other possible explanations for the results all of the above