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