You are dispatched to a residence for a 50-year-old woman with respiratory distress. While you are assessing the patient, she tells you that she began experiencing flulike symptoms 4 days ago, shortly after delivering mail on the rural mail route for which she is responsible. Due to her illness, she has been unable to return to work. Her blood pressure is 90/50 mm Hg, pulse rate is 120 beats/min, and respirations are 26 breaths/min and labored. Auscultation of her breath sounds reveals the presence of coarse crackles. This patient has MOST likely been exposed to:
A) anthrax.
B) smallpox.
C) a neurotoxin.
D) botulinum toxin.
Answer: A) anthrax.
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Living things are highly ordered and maintain a state of low entropy. How is that possible given what we know about the second law of thermodynamics?
a. Living things are closed systems and the net change in entropy cannot be measured accurately. b. Though living things seem orderly, they are actually inherently disordered and do so much damage to their environments that the net enthalpy offsets the net entropy. c. Despite the orderly nature of living things, the universe’s total entropy continues to increase due to losing usable energy with each energy transfer that occurs. d. Living things are an exception to the second law of thermodynamics as this law only applies to non-living and inorganic substances in the universe.
The spur-and-groove formation of coral reefs is used as a means of:
a. obtaining more sunlight. b. dissipating the energy of the waves. c. ensuring good circulation. d. capturing more zooplankton. e. directing fish migrations.
You placed equal numbers of dark and light varieties of feeder crickets into a terrarium containing a
species of lizard. After two days you notice that the dark variety of the crickets was less common than the light variety. What process is taking place on a small scale within the terrarium? Design an experiment in which you would try to determine if color or taste is the primary factor responsible for the selective feeding of the lizards What will be an ideal response?
Which of the following is the best explanation for the presence of both chloroplasts and mitochondria in plant cells?
a, in the light, plants are photosynthetic autotrophs. In the dark, they are heterotrophs. b. if plants cannot produce enough ATP in the process of photosynthese to meet their energy needs, they can produce it in aerobic respiration c. sugars are produced in chloroplasts. these sugars can be stored in the plant for later use, converted to other chemicals, or broken down in aerobic respiration to yield ATP for the plant to use to meet its energy needs d. the leaves and sometimes the stems of plants contain chloroplasts which produce APT to meet the energy needs of these plant parts. The roots of plants contain mitochondria which produce ATP to meet the energy of these plant parts.