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Physiology
Ecology and Evolution
Genetics
Investigation and Experimentation
Cell Biology
100
What is the greatest danger to a patient who has had damage to the skin?
C. infections in uncovered tissues
100
Earth has undergone some catastrophic changes from time to time. Which of these most likely explains why life on Earth continued following these catastrophes?
D. A wide diversity of species existed.
100
Which of the following best describes meiosis?
B. It occurs only in cells in the reproductive structures of the organism.
100
Two students were testing the amount of fertilizer that would best promote the growth of strawberries in a garden. Which of the following could be an unavoidable source of experimental error?
B. variation in the strawberry plants
100
Which molecule in plant cells first captures the radiant energy from sunlight?
C. chlorophyll
200
The respiratory system depends on the nervous system for signals to
B. coordinate muscles controlling breathing.
200
Which of these organisms would most likely be found at the top of an energy pyramid?
C. sharks
200
Mendel hypothesized that reproductive cells have only one factor for each inherited trait. This hypothesis is supported by the observation that
C. haploid cells are produced by meiosis.
200
After a volcanic eruption has covered an area with lava, which of the following is the most likely order of succession in the repopulation of the area?
A. lichens → grasses → shrubs → trees
200
A cell from heart muscle would probably have an unusually high proportion of
B. mitochondria.
300
Striking the tendon just below the kneecap causes the lower leg to jerk. Moving an object quickly toward the face can cause the eyes to blink shut. These are examples of
C. reflex reactions.
300
Which of these best illustrates natural selection?
A. An organism with favorable genetic variations will tend to survive and breed successfully.
300
In fruit flies, the gene for red eyes (R) is dominant and the gene for sepia eyes (r) is recessive. What are the possible combinations of genes in the offspring of two red-eyed heterozygous flies (Rr)?
D. RR, Rr, and rr only
300
A computer model of cellular mitosis can simulate the aspects of cellular division quite well. However, microscopic observation of actual cellular mitosis can improve understanding because actual observations
A. may reveal greater unknown complexities.
300
The cell membrane of the red blood cell will allow water, oxygen, carbon dioxide, and glucose to pass through. Because other substances are blocked from entering, this membrane is called
B. semi-permeable.
400
The Sabin vaccine is a liquid containing weakened polio viruses. Vaccinated individuals become protected against polio because the weakened viruses
C. promote production of antibodies.
400
In carrier pigeons there is a rare inherited condition that causes the death of the chicks before hatching. In order for this disease to be passed from generation to generation there must be parent birds that
A. are heterozygous for the disease.
400
Although there are a limited number of amino acids, many different types of proteins exist because the
C. sequence and number of amino acids is different.
400
In most stable freshwater environments, populations of Daphnia are almost entirely female and reproduce asexually. However, males are observed in low oxygen environments or when food is scarce. Based on these observations, a researcher suggests that male Daphnia develop in response to unfavorable environmental conditions. This is an example of a
D. hypothesis.
400
The first stage of photosynthesis in a chloroplast is
A. light-dependent.
500
Carbon dioxide is produced as cells break down nutrients for energy. What pairs of systems would participate in removing the carbon dioxide from the body?
B. Circulatory and Respiratory
500
A population of termites initially consists of darkly colored and brightly colored members. After several generations, the termite population consists almost entirely of darkly colored members because the brightly colored termites are easier for a predatory species of insectivores to locate. This situation is an example of
B. natural selection.
500
If a human baby boy inherits a recessive allele from his mother, in what circumstance would he most likely show the trait coded for by the recessive allele?
The baby inherits the recessive allele from his father, or the allele is on the X chromosome.
500
Which information was most important to the development of genetic engineering techniques?
D. the structure of a DNA molecule
500
Eukaryotic cells are differentiated from prokaryotic cells because eukaryotic cells
D. have nuclei.