Practice Exam Flashcards
By what process does carbon enter the living aspect of terrestrial ecosystems, and from what reservoir is id drawn?
photosynthesis, from the atmosphere
If grasshoppers eat grass and are eaten by birds what tropic level are grasshoppers?
Primary consumers
If radioactive phosphorus were applied to an ecosystem as a dilute solution which organisms would you expect to have the radioactive tissue first?
Plants
Which of the following anthropogenic substances would you expect to have a cooling influence on the cimate? A-aerosols B-CFCs C- Carbon Dioxide D- Methane E-None of the above
A- aerosols
In terrestrial ecosystems, what do the bacteria Rhixobium, Bradyrhixobium, and cyanobacteria such as Nostoc and Anabaena have in common?
The fix atmospheric nitrogen
Which of the following ecosystems has the highest net primary productivity per unit area? A-Open ocean B-boreal forest C-Arid grassland D-Arctic tundra E-tropical rain forest
E-Tropical rain forest
make the following statement about the movement of matter and energy in ecocystems true. (with relation to recycling)
Matter______, Energy ______
recycles
Does not
A man is stranded on a desert island with NO VEGETATION for some reason an intact crate of corn flakes washes ashore with him, and a crate of 15 live chickens what should he do to survive the longest?
Eat the chickens then eat the corn flakes
Which of the following statements abou the cycling of Nitrogen in the biosphere are essentially correct?
A-The atmosphere is the most important nonliving reservoir of Nitrogen
B-Changes in the concentration of atmospheric Nitrogen exhibit a profound effect on the climate.
C-Nitrogen fixation is limited to a few species of organisms, including members of the genus Rhizobium, Anabaena, and Bradyrhyxobium
D-A and C
D- A and C
Which statements about global climate change are scientific statements supported by evidence?
A-All things must live in harmony with nature, or nature will act to restore the balance.
B-Atmospheric concentrations of CO2 have increased dramatically over the last century.
C-High atmospheric concentrations of CO2 are linked to warm periods in the history of the Earth.
D-B and C
E- All of the above
D- B and C
Which of the following platary boundaries has our species already crossed? A-Insufficient room to live B-Global biodiversity loss C- Climate change D- Global fresh water availability E-B and C
E- B and C
About how many protein-coding genes are there in the human genome
24,000
Which of the following genetic processes provide genetic diversity among products of a meiotic division? A-linkage B-recombination C-Assortment D-Mitosis E-A and C
E-A and C
Which of the following statements about genes, alleles, and loci, are essentially correct?
A-A gene is a sequence of DNA that codes for a single protein, in a single tissue with a single function.
B-A locus is the location of a gene in the genome, and is a place where allelic variation may occur from one individual to the next.
C-Typically, different individuals in a population have different alleles at some genetic loci, but not others.
D-B and C
E-All of the above
D-B and C
Which of the following statements about the allele that causes sickle cell anemia are correct?
A- it is a recessive allele.
B-It is caused by a single-nucleotide substitution
C-It is on the Y chromosome
D-A and B
E-All of the above
D- A and B
Which of the following disorders is caused by an error in the process of melosis? A-Marfan syndrome B-Lissencephaly C-Down Syndrome D-Turners Syndrome E-C and D
E- C and D
Which of the following scientists, are usually not given the same credit for their discoveries as contemporary scientists they worked alongside, or who came up with the same ideas? A-Rosalind Franklin B-Alfred Russell Wallace C-Gregor Mendel D-A and B E-None of the above
D- A and B
Which effects of GMO maize are actual or scientifically supported?
A-Known to causes cancer in lab animals.
B-Are grown in massive non sustainable monocultures.
C-Lack genetic variation and are sold by corporations, breaking the evolutionary relationship between farmer and the crops.
D-All of the above
E-B and C
E-B and C
A student is being tested for “psychic abilities” in the medieval science lab. She draws 25 cards, each of which has one of 5 symbols on the back, these symbols occur at equal frequency and the deck has been shuffled. Assuming the protocols are the same as the lab manual-what are the expected numbers of correct and incorrect answers and how many degrees of freedom?
A-5 correct, 20 incorrect, 1 degree
What is the evolutionary significance of the tight linkage of the three loci for pin vs. thrum phenotypes in wild primroses?
It encourages outcrossing.
Why is that most terrestrial ecosystems have five or fewer links in the longest food chain?
Only a fraction of the energy at each trophic level is passed to a higher trophic level, which severely curtails the amount of energy available to the top trophic levels, and prohibits long food chains.
Available scientific evidence suggests that the age of the earth is
4.5 billion years
What is the significance of evolutionary biology to the control of harmful insect species?
An understanding of evolution provides insight into the origin, spread, and dangers of pesticide resistance in insect species that are pests.
What does the fossil record say about the origin of tetrapods?
Fossil tetrapods, document aquatic and semi-aquatic member of lineages that had evolved limbs and shoulder girdles, but there is no smooth transition from terrestrial to aquatic forms.
Which of the following are actual potential examples of adaptation
A-Jaws of a spinosaur were long and thin, features associated with catching fish and aquatic creatures.
B-The jaws of Tyrannosaurus rex were extremely strong, and the teeth blunt features associated with crushing bones.
C-Mosquitoes in Bangkok evolved the ability to circumvent the toxicity of DDT.
D-Nothosaurs, which existed in the Triassic period, went extinct.
E-A B and C
E- A B and C
