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What are the three types of mixtures?
A. Powders, Gels, Smooth
B. solutions, suspensions, colloids
C. cosmic , suspensions , colloids
D. absorbing , suspensions , colloids
Answer:
|
B
|
sciq
|
Double strands of what wrap around histone proteins to form nucleosomes, which are coiled into a chromatin fiber?
A. ribosomes
B. chromatids
C. bacteria
D. dna
Answer:
|
D
|
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|
What is the process when animals maintain an internal temperature?
A. homeostasis
B. osmoregulation
C. thermoregulation
D. bioaccumulation
Answer:
|
C
|
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|
Both androgen secretion and spermatogenesis occur continuously starting with what?
A. mutation
B. walking
C. birth
D. puberty
Answer:
|
D
|
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|
Where does the process of digestion start?
A. stomach
B. esophagus
C. mouth
D. small intestine
Answer:
|
C
|
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|
As distance from the source increases, the area covered by the sound waves increases, lessening what?
A. intensity
B. velocity
C. duration
D. density
Answer:
|
A
|
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|
Mountain ranges, plateaus, and plains are features of what large landforms?
A. States
B. Countries
C. continents
D. planets
Answer:
|
C
|
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|
How many pathogens can each droplet contain?
A. hundreds
B. tens
C. billions
D. thousands
Answer:
|
D
|
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|
The ability to change color, separately mobile and stereoscopic eyes, and rapidly extrudable tongues are distinguishing features of what lizards?
A. snakes
B. crocodiles
C. geckos
D. chameleons
Answer:
|
D
|
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|
What is the other name of newton’s first law?
A. law of matter
B. mass and matter
C. law of momentum
D. law of inertia
Answer:
|
D
|
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|
The velocity at the beginning of the time interval is called what?
A. internal velocity
B. initial velocity
C. growing velocity
D. previous velocity
Answer:
|
B
|
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|
In which sphere of the atmosphere do the northern and southern lights occur?
A. stratosphere
B. lithosphere
C. ionosphere
D. thermosphere
Answer:
|
D
|
sciq
|
What carbohydrate from fruit juices is a gel-forming substance important in jelly making?
A. gelatin
B. cellulose
C. potassium
D. pectin
Answer:
|
D
|
sciq
|
Warm water from the equator mixes with cold water from where?
A. the continents
B. the oceans
C. the poles
D. the tropics
Answer:
|
C
|
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|
A single amino acid substitution in hemoglobin leads to what disease?
A. sickle cell anemia
B. crohn's disease
C. AIDS
D. down's syndrome
Answer:
|
A
|
sciq
|
Why does the heating element of a toaster get hot so quickly?
A. magnetic force
B. good conductor
C. charged battery
D. good insulator
Answer:
|
B
|
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|
What is the industrial chemical produced in greatest quantity worldwide?
A. liquid acid
B. boric acid
C. gaseous acid
D. sulfuric acid
Answer:
|
D
|
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|
What term is used to describe a protein that acts as a biological catalyst?
A. nucleus
B. heterozygote
C. enzyme
D. protein
Answer:
|
C
|
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|
What is the transfer of energy by waves called?
A. evaporation
B. convection
C. radiation
D. vibration
Answer:
|
C
|
sciq
|
What are the the individual protein subunits making up the capsid called?
A. axons
B. capsomeres
C. pores
D. telomeres
Answer:
|
B
|
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|
The eukaryotic cell cycle is regulated by a what?
A. protons control system
B. nucleus control system
C. molecular control system
D. anti-lock control system
Answer:
|
C
|
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|
How many identical daughter cells are created at the end of cytokinesis?
A. four
B. two
C. one
D. three
Answer:
|
B
|
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|
Which disease does the bacteria salmonella cause in humans?
A. blood poisoning
B. water poisioning
C. skin poisoning
D. food poisoning
Answer:
|
D
|
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|
What term describes the application of knowledge to real-world problems and is practiced by engineers?
A. mechanisms
B. invention
C. science
D. technology
Answer:
|
D
|
sciq
|
What surrounds the lungs in a thoracic cavity?
A. double membrane
B. single membrane
C. calcium
D. water
Answer:
|
A
|
sciq
|
When lactose is absent, a repressor protein binds to what?
A. operator
B. network
C. worker
D. differential
Answer:
|
A
|
sciq
|
The four moons of jupiter are collectively named after what 17th century astronomer, who discovered them?
A. darwin
B. galileo
C. Linnaeus
D. copernicus
Answer:
|
B
|
sciq
|
What is the term for the distance between two corresponding points on adjacent waves?
A. variation
B. arc wave
C. wavelength
D. bandwidth
Answer:
|
C
|
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|
Which instruments are used to measure the angle of the slope of a volcano?
A. calipers
B. compass
C. altimeter
D. tiltmeters
Answer:
|
D
|
sciq
|
What is the term for matter that does not let any light pass through?
A. opaque
B. reflective
C. mirrored
D. dark
Answer:
|
A
|
sciq
|
Gain or loss of what causes an atom to become a negatively or positively charged ion?
A. protons
B. electrons
C. nucleus
D. neutrons
Answer:
|
B
|
sciq
|
The electrochemical potential across a membrane determines the tendency of an ion to do what?
A. attach to the membrane
B. move away from the membrane
C. destroy the membrane
D. cross the membrane
Answer:
|
D
|
sciq
|
Nucleic acids are polymers made of monomers called what?
A. nucleotides
B. carotenoids
C. peptides
D. loops
Answer:
|
A
|
sciq
|
Antibodies also mark pathogens for destruction by which cells?
A. interferons
B. phagocytic
C. platelets
D. leukocytes
Answer:
|
B
|
sciq
|
What are small organelles and are the site of protein synthesis called.
A. chromosomes
B. chloroplasts
C. chromosomes
D. ribosomes
Answer:
|
D
|
sciq
|
What term is defined as the ability to locate objects in the dark by bouncing sound waves off them.
A. morphology
B. echolocation
C. night vision
D. thermodynamics
Answer:
|
B
|
sciq
|
Ringworm and athlete’s foot are common human diseases caused by types of what?
A. viruses
B. multicellular bacteria
C. fungi
D. acids
Answer:
|
C
|
sciq
|
Vertical layering is an important feature of the terrestrial type of what kind of community?
A. ecosystem
B. environment
C. biome
D. habitat
Answer:
|
C
|
sciq
|
What do many cells depend on glucose for?
A. heating
B. energy
C. osmosis
D. food
Answer:
|
B
|
sciq
|
When continental crust is pulled apart, it breaks into blocks that are separated by what?
A. layers
B. faults
C. levels
D. holes
Answer:
|
B
|
sciq
|
What body part boasts three articulations and includes the patella?
A. ankle
B. hip
C. knee
D. elbow
Answer:
|
C
|
sciq
|
The physical properties of gases are predictable using mathematical formulas known as what?
A. air laws
B. gas laws
C. state laws
D. vapor laws
Answer:
|
B
|
sciq
|
What is the disease where some alveoli of the lungs fill with fluid?
A. lung cancer
B. pneumonia
C. lyme disease
D. leukemia
Answer:
|
B
|
sciq
|
The primary function of leaves is to collect sunlight and make food by what process?
A. osmosis
B. nuclear fission
C. photosynthesis
D. duplicate process
Answer:
|
C
|
sciq
|
In which type of reaction are compounds formed?
A. chemical reaction
B. balanced reaction
C. gaseous reaction
D. acid reaction
Answer:
|
A
|
sciq
|
For feeding, the head contains one pair of mandibles and two pairs of what?
A. antennae
B. maxillae
C. tracheae
D. chelicerae
Answer:
|
B
|
sciq
|
What term given to animals like reptiles is a synonym for ectothermic, which means that their heat comes from their environment?
A. thermal regulating
B. hot-blooded
C. cold-blooded
D. warm-blooded
Answer:
|
C
|
sciq
|
What forms in the ocean from the seafloor spreading?
A. new oceanic crust
B. tsunamis
C. underwater volcanoes
D. earthquakes
Answer:
|
A
|
sciq
|
What does ozone in the stratosphere protect us from?
A. solar traces
B. solar rays
C. comets
D. acid rain
Answer:
|
B
|
sciq
|
What is the basic unit of matter?
A. atom
B. nucleus
C. neutron
D. dark material
Answer:
|
A
|
sciq
|
What is the name of the protein that is found in hairs and nails?
A. cellulose
B. keratin
C. chromatin
D. Skin
Answer:
|
B
|
sciq
|
When fuel is burned most of the energy is released as what?
A. humidity
B. precipitation
C. heat
D. condensation
Answer:
|
C
|
sciq
|
A change in one or more physical properties of matter without any change in chemical properties is called what?
A. atmospheric change
B. physical change
C. negative change
D. positive change
Answer:
|
B
|
sciq
|
Particles with what type of electric charges attract each other?
A. simple
B. same
C. opposite
D. similar
Answer:
|
C
|
sciq
|
Avoiding carcinogens helps lower the risk of what?
A. cancer
B. colds and flu
C. radiation
D. sunburn
Answer:
|
A
|
sciq
|
What is the mechanism that accounts for the drifting of continents?
A. volcanic spreading
B. earth spreading
C. ridges spreading
D. seafloor spreading
Answer:
|
D
|
sciq
|
In a dehydration reaction, what is removed as two monomers are joined together?
A. nitrogen
B. water
C. air
D. carbon
Answer:
|
B
|
sciq
|
What is the smallest unit of structure and function of all living organisms?
A. chromosome
B. organelle
C. the cell
D. organ
Answer:
|
C
|
sciq
|
The dual character is critical for the formation of the what?
A. lipid bilayer
B. muscle bilayer
C. carbon bilayer
D. tissues bilayer
Answer:
|
A
|
sciq
|
In humans, a zygote has how many chromosomes?
A. 42
B. 23
C. 36
D. 46
Answer:
|
D
|
sciq
|
The elements are arranged in rows, each representing the filling of what shell?
A. plasma membrane
B. proton
C. electron
D. neutron
Answer:
|
C
|
sciq
|
The water cycle is powered by energy from where?
A. sun
B. earth
C. atmosphere
D. living things
Answer:
|
A
|
sciq
|
When lactose is present in the cell, what allows the lac genes to be expressed?
A. the addition of water
B. nonbinding of repressor protein
C. concentration of repressor protein
D. binding of expressor protein
Answer:
|
B
|
sciq
|
What class of animals, translated as “head foot”, includes octopuses, squids, cuttlefish, and nautilus?
A. cephalopods
B. bivalves
C. crustaceans
D. mollusks
Answer:
|
A
|
sciq
|
What can be calculated by solving the average speed formula?
A. accelaration
B. mass or time
C. distance or time
D. distance or mass
Answer:
|
C
|
sciq
|
Transverse divisions are associated with leaf elongation, and longitudinal divisions are associated with what?
A. leaf multiplying
B. leaf broadening
C. leaf coloring
D. leaf shedding
Answer:
|
B
|
sciq
|
Of the four nerve plexuses, two are found at the cervical level, one at the lumbar level, and one at which level ?
A. peripheral
B. cranial
C. vascular
D. sacral
Answer:
|
D
|
sciq
|
When does sublimation occur?
A. when the snow melts the ice caps
B. when the ice and snow change directly into water vapors
C. when the ice and sand change directly into water vapors
D. when the wind changes direction
Answer:
|
B
|
sciq
|
What organism is responsible for most decomposition in forest?
A. bacteria
B. yeast
C. coral
D. fungi
Answer:
|
D
|
sciq
|
Cancer of the testes is most common in males between what ages?
A. 10 and 20
B. 50 and 60
C. 15 and 35
D. 70 and 90
Answer:
|
C
|
sciq
|
Prions are slow-acting, virtually indestructible infectious proteins that cause diseases of what vital organ in mammals?
A. liver
B. brain
C. heart
D. lung
Answer:
|
B
|
sciq
|
What does the male reproductive system consist of?
A. structures that produce sperm and secrete testosterone
B. structures that collect urine
C. structures that produce ova
D. organs that produce estrogen
Answer:
|
A
|
sciq
|
What causes genetic disorders in humans?
A. pollutants of chromosome
B. variations of chromosome
C. alterations of genes
D. alterations of chromosome
Answer:
|
D
|
sciq
|
What can lead to a loss of genetic variation within populations?
A. adaptation
B. migration
C. natural selection
D. genetic drift
Answer:
|
D
|
sciq
|
Four electron groups orient themselves into what shape that has four faces?
A. multicellular
B. spherical
C. tetrahedron
D. circular
Answer:
|
C
|
sciq
|
The primary hormones derived from lipids are what?
A. antibiotics
B. steroids
C. melatonins
D. amino acids
Answer:
|
B
|
sciq
|
What are most metal objects made of?
A. bronze
B. tin
C. metal alloys
D. aluminum
Answer:
|
C
|
sciq
|
What law explains how the change in direction of the light ray depends on how the speed of light changes, which in turn is related to the indices of refraction of the media involved?
A. Born's law
B. Boyle's law
C. law of refraction
D. Newton's first law
Answer:
|
C
|
sciq
|
What limits the growth or development of an organism, population, or process?
A. decreasing factor
B. limiting factor
C. mutation factor
D. limiting membrane
Answer:
|
B
|
sciq
|
The primary application of biotechnology is in what field?
A. psychology
B. medicine
C. physics
D. chemistry
Answer:
|
B
|
sciq
|
In naming ternary compounds, which type of particle is stated first?
A. subatomic
B. molecule
C. cation
D. anion
Answer:
|
C
|
sciq
|
The pollen grain absorbs water and does what after it adheres to the stigma of a carpel?
A. dissolves
B. germinates
C. reproduces
D. blooms
Answer:
|
B
|
sciq
|
What term refers to change in position over time?
A. velocity
B. Direction Replacement
C. Position Replacement
D. acceleration
Answer:
|
A
|
sciq
|
Ice ages, continental drift, and giant meteorites striking earth have caused what phenomenon?
A. depletion
B. extinction
C. gravity
D. waves
Answer:
|
B
|
sciq
|
What can all living things sense and respond to in their environment?
A. stimuli
B. warmth
C. wind
D. sunlight
Answer:
|
A
|
sciq
|
What do we call use of electric current to encode information?
A. metals
B. products
C. ferious
D. electronics
Answer:
|
D
|
sciq
|
How many additional pairs of appendages do arachnids have?
A. 2
B. 4
C. 6
D. 0
Answer:
|
A
|
sciq
|
Melting points are temperatures that are high enough to separate liquids from which substances?
A. gases
B. solids
C. oils
D. seeds
Answer:
|
B
|
sciq
|
Strong, stable bonds between carbon atoms produce complex molecules containing chains, branches, and rings; the chemistry of these compounds is called what?
A. animal chemistry
B. inorganic chemistry
C. organic chemistry
D. nuclear chemistry
Answer:
|
C
|
sciq
|
What are the blood vessels that carry blood toward the heart and tend to have thinner walls?
A. capillaries
B. veins
C. clots
D. glands
Answer:
|
B
|
sciq
|
What is a measure of the amount of space a substance or an object takes up?
A. speed
B. volume
C. density
D. mass
Answer:
|
B
|
sciq
|
Potassium, calcium, and magnesium are considered what kind of nutrients?
A. micronutrients
B. minor nutrients
C. major nutrients
D. macronutrients
Answer:
|
D
|
sciq
|
What normally prevent a positively charged particle from colliding and reacting with a positively charged nucleus, but may be overcome by kinetic energy?.
A. electrostatic repulsions
B. evaporation repulsions
C. toxic repulsion
D. kinetic repulsions
Answer:
|
A
|
sciq
|
Sometimes two or more distinct phenotypes can each have their advantages and be selected for by natural selection; this is known as what?
A. multiplying selection
B. shedding selection
C. diversifying selection
D. extra selection
Answer:
|
C
|
sciq
|
Management programs based on population-regulating factors have helped prevent the extinction of many?
A. endangered species
B. abundant species
C. omnivores
D. keystone species
Answer:
|
A
|
sciq
|
What basic plant structure is the site of photosynthesis?
A. spores
B. leaves
C. nucleus
D. roots
Answer:
|
B
|
sciq
|
What provides the identities of the reactants and products involved in the chemical change?
A. chemical formulas
B. atomic numbers
C. electron shells
D. genome sequence
Answer:
|
A
|
sciq
|
What process creates sperm?
A. hypothalamus
B. altostratus
C. spermatogensis
D. genesis
Answer:
|
C
|
sciq
|
Both fluorine and lithium are highly reactive elements because of their number of what?
A. valence electrons
B. positrons
C. covalence electrons
D. shell electrons
Answer:
|
A
|
sciq
|
Earth acts like a giant version of what device, with angular momentum along its axis and pointing at polaris, the north star?
A. telescope
B. gyroscope
C. accelerator
D. compass
Answer:
|
B
|
sciq
|
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