Earth and Space
Hydraulic fracturing is used to obtain which of the following resources?
W) Coal
X) Natural gas
Y) Uranium ore
Z) Water
X) NATURAL GAS
The webbed hand of a human embryo develops into five separate fingers by a process of programmed cell death. What is the term for this process?
APOPTOSIS
What is the maximum number of electrons that the 3d level can hold?
W) 2
X) 6
Y) 10
Z) 14
Y) 10
For an airplane in steady, level flight, what resisting force is equal and opposite to the vehicle thrust?
ANSWER: DRAG (ACCEPT: AIR RESISTANCE, FRICTION)
If n is an integer, and xn is positive for all nonzero real numbers x, which of the following must be true about n?
W) n is greater than zero
X) n does not equal zero
Y) n is even
Z) n is odd
Y) n IS EVEN
What state of matter is the most common in the universe?
Which of the following examples is NOT evidence for evolution from a common ancestor?
W) All living things have basic cell processes that are similar and use similar molecules
X) Hox genes, or homeotic genes, control vertebrate body plans and are homologous in all vertebrates
Y) Even though snakes don't have legs, some snake embryos have limb buds during development similar to other reptile embryos
Z) Bats and birds both have wings that are adaptations for flying
ANSWER: Z) BATS AND BIRDS BOTH HAVE WINGS THAT ARE ADAPTATIONS FOR FLYING
Which of the following substances would you expect to be the most miscible with water?
W) Methanol
X) Ethyl acetate
Y) 2-butanal
Z) Butyraldehyde
W) METHANOL
Which of the following is NOT true of laser light?
W) It is highly coherent
X) It is highly dispersive
Y) It is highly monochromatic
Z) It is highly directional
X) IT IS HIGHLY DISPERSIVE
What is the second derivative with respect to x of 2x3 –12 evaluated at x = 3?
36
What layer of the Earth’s atmosphere contains approximately 75% of its air mass?
W) Troposphere
X) Mesosphere
Y) Stratosphere
Z) Thermosphere
W) TROPOSPHERE
What is the probability of obtaining an F1 purple pea flower if purple is dominant, white is recessive, and a parental cross is made between a heterozygous purple and homozygous white flower?
W) 1/8
X) 1/4
Y) 1/2
Z) 1
Y) 1/2
In dilute aqueous solution, H2SO4 is classified as which of the following?
W) Strong acid
X) Weak acid
Y) Strong base
Z) Weak base
W) STRONG ACID
A helicopter uses a main rotor as propulsion and control, but requires a tail rotor to counteract torque. The balance of forces resulting from this configuration is represented best by which of Newton's laws?
ANSWER: THIRD (ACCEPT: FOR EVERY ACTION, THERE IS AN EQUAL AND OPPOSITE REACTION)
What type of image is produced by a concave spherical mirror
when an object is placed outside its focal point?
W) Real and upright
X) Real and inverted
Y) Virtual and upright
Z) Virtual and inverted
X) REAL AND INVERTED
Identify all of the following three statements that are true of seismic waves: 1) P waves are compressional; 2) S waves travel through fluids; 3) P waves travel faster than S waves.
ANSWER: 1 and 3
Which of the following best describes a lysogenic cell?
W) It contains a prophage
X) It is immune to viral infection
Y) It is actively producing viral particles
Z) It is about to lyse
W) IT CONTAINS A PROPHAGE
MATH
In the balanced equation for the combustion of octane, what are the coefficients for carbon dioxide and water respectively?
16, 18
MATH
A horizontal force of 90 newtons is applied to a 20-kilogram block that is initially at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.5 and the coefficient of kinetic friction of 0.2. In meters per second squared, what is the acceleration of the block?
0
What is the primary gaseous element of wood gas, a product of gasification?
NITROGEN
In the distant future, the Andromeda Galaxy will collide with the Milky Way. Which of the following would a hypothetical alien presently living in Andromeda observe about Balmer lines from our galaxy?
W) Their wavelengths are shorter than expected
X) Their wavelengths are longer than expected
Y) Their frequencies are lower than expected
Z) They are not subject to Zeeman splitting
W) THEIR WAVELENGTHS ARE SHORTER THAN EXPECTED
Which of the following statements best describes the difference in responses of plasma cells and cytotoxic T-cells?
W) Plasma cells respond the first time the invader is present, cytotoxic T-cells respond subsequent times
X) Plasma cells execute the cell-mediated response, cytotoxic T-cells execute the humoral response
Y) Plasma cells secrete antibodies against a pathogen, cytotoxic T-cells kill virus-infected cells
Z) Plasma cells confer active immunity, cytotoxic T-cells confer passive immunity
ANSWER: Y) PLASMA CELLS SECRETE ANTIBODIES AGAINST A PATHOGEN, CYTOTOXIC T-CELLS KILL VIRUS-INFECTED CELLS
Nitrogen monoxide is an example of which of the following?
W) An expanded octet
X) A resonance molecule
Y) A dimerizing molecule
Z) A free radical
Z) A FREE RADICAL
What principle states that the net response at a given point caused by two waves is the sum of the responses that those waves would have caused individually?
SUPERPOSITION
Identify all the following three categories of fuel cells that can be considered types of proton exchange membrane fuel cells? 1) Direct-methanol, 2) Molten carbonate, 3) Phosphoric acid.
1 and 3