Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 56669
TLS Online TPP Program

#Question id: 12097

The herbaceous plant Achillea lanulosa is widespread in the Northern Hemisphere. Phenotypic variation in the species has been extensively studied along an altitudinal gradient from sea level to over 3,000 meters. In California there is conspicuous variation in  height; alpine plants are only several centimeters tall  while  those in  the San Joaquin Valley may reach a height of 1.8 meters. Adaptation to different local environments also results in variation in physiological processes such as photosynthetic rate, resistance to cold, and the timing of dormancy.


Which of the following methods would be best to determine whether the phenotypic variation in Achillea lanulosa is due to genotypic variation?

#Unit 10. Ecological Principles
  1. Determining whether viable hybrids between phenotypically different populations can be produced
  2. Looking for chromosomal differences between populations at the extremes of the altitudinal range
  3. Determining whether phenotypic differences are maintained when plants from different altitudes are grown under the same environmental conditions
  4. Assessing the amount of phenotypic variation within populations along the entire altitudinal range
More Questions
TLS Online TPP Program

#Question id: 12380

#Unit 7. System Physiology – Animal

A person with normal body fluid volumes weighs 60 kg and has an extracellular fluid volume of approximately 12.8 L, a blood volume of 4.3 L, and a hematocrit of 0.4; 57% of his body weight is water. What is the approximate intracellular fluid volume?
TLS Online TPP Program

#Question id: 12379

#Unit 7. System Physiology – Animal

A healthy 29-year-old man runs a 10-km race on a hot day and becomes very dehydrated. Assuming that his antidiuretic hormone levels are very high, in which part of the renal tubule is the most water reabsorbed?
TLS Online TPP Program

#Question id: 12308

#Unit 7. System Physiology – Animal

 Which of the following statements is correct?
TLS Online TPP Program

#Question id: 12307

#Unit 7. System Physiology – Animal

If a person has a kidney transport maximum for glucose of 350 mg/min, a GFR of 100 ml/min, a plasma glucose of 150 mg/dL, a urine flow rate of 2 ml/min, and no detectable glucose in the urine, what would be the approximate rate of glucose reabsorption, assuming normal kidneys?
TLS Online TPP Program

#Question id: 12306

#Unit 7. System Physiology – Animal

 Which of the following is true of the tubular fluid that passes through the lumen of the early distal tubule in the region of the macula densa?
TLS Online TPP Program

#Question id: 12305

#Unit 7. System Physiology – Animal

Which of the following would be expected to cause a decrease in extracellular fluid potassium concentration (hypokalemia) at least in part by stimulating potassium uptake into the cells?