0. Because only the ____________gland uses iodine to make its hormone thyroxine, radioactive
iodine is often used as a treatment for tumors of this gland.
a. Thyroid
b. Pituitary
c. Adrenal
d. Testicular
e. Pancreatic 61. The chemical signals released at the end of a pre-synaptic neuron that moves across the
synaptic cleft and are received by the post-synaptic neuron are called________
a. Hormones
b. Neurotransmitters
c. Pheromones
d. Histamines
e. Cytokines 62. Where are the receptors located for a protein type hormone such as insulin?
a. Inside of every cell in the body
b. Inside of the hormone’s target cells
c. Within the plasma membrane of every cell in the body
d. Within the plasma membrane of the hormone’s target cells
63. Which of the following does not pair a hormone with what it regulates in the human body?
a. Insulin……………… decreases in blood glucose level
b. Glucagon…………increases in blood glucose level
c. ADH (antidiuretic hormone)…….. water conservation in kidney
d. Oxytocin……………uterine contractions during delivery of a baby
e. Parathyroid hormone………. Controls vitamin D levels
64. In the figure below, which number would designate the cold tundra biome with low average
annual precipitation?
a. 1
b. 3
c. 4
d. 5
e. 6 65. In the figure above, what is the range of average annual precipitation (cm) for biome #3?
a. 5-100
b 50-175
c. 150-450
d. 0-10
e. 50 66. What factors could prevent a population from growing beyond its carrying capacity?
a. Disease
b. Limited food
c. Limited places to live
d. Competition
e. All of the above are factors
67. (see graph below) 67. Choose the incorrect statement about the logistic model
of population growth that is illustrated to the left.
a. it fits an S shaped curve
b. it takes into account available resources
c. it is describing a population with limiting factors
d. growth slows down as the population size approaches its
carrying capacity
e. it represents human population growth over time 68. Which of the following represents a biological community?
a. All the black bears living in a certain area
b. A species of shark in the Gulf of Mexico
c. The temperature, amount of rainfall, monkeys and plants in a rainforest
d. All of the living organisms inhabiting a New Mexico desert
e. The number of squirrels in Central Park New York
69. Which of the following lists only abiotic environmental factors?
a. Temperature, fire, wind, parasites
b. Soil minerals, oxygen levels, light, competitors
c. Wind, temperature, soil minerals, light
d. Light, rainfall, predators, temperature
Precipitation, cloud cover, wind, symbionts
70. The process of primary succession occurs ____________
a. Around a recently erupted volcano
b. On a newly plowed field
c. On a hillside that has suffered a mudslide
d. On a recently flooded riverbank
e. On a freshly cleared subdivision lot 71. 70. What is not true about this population?
a. The population will increase at a rapid pace.
b. The pre-reproductive population is larger than the
elderly population.
c. This pattern is typical of a developed country
d. There is a close balance in the population in terms
of males and females
e. This population will require many more resources in
the future. 72. Which of these is a density dependent factor in terms of its effect on populations?
a. Hurricane
b. Competition and parasitism
c. Earthquake
d. Volcano
e. Windstorm
73. Population density is the number of __________ in a given area.
a. Adults of a single species
b. Females of a single species
c. Prereproductive individuals of a single species
d. Individuals of a single species
74. In a food chain “plant to caterpillar to lizard to snake”, which of these is the herbivore?
a. Plant
b. Caterpillar
c. Lizard
d. Snake
e. None of these
75. The term for a species that is found only in a particular place or region and nowhere else ( ie
kangaroo in Australia) is called a(n)__________species
a. Threatened
b. Endangered
c. Endemic
d. Keystone
e. Invasive

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