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What is the most abundant living thing on earth that can be found in almost any environment?
A. bacteria
B. pests
C. viruses
D. pathogens
Answer: | A |
Oxidation does not necessarily require heating. which is the common and natural method of oxidation?
A. ageing
B. fermentation
C. rusting
D. boiling
Answer: | C |
Toward the late stages of pregnancy, a drop in progesterone and stretching forces from the fetus lead to increasing uterine irritability and prompt labor. contractions serve to dilate the cervix and expel this?
A. uteris
B. blood
C. tissues
D. newborn
Answer: | D |
Light bends when it passes in from what to what?
A. water to air
B. air to water
C. product to water
D. air to ground
Answer: | B |
Photosynthesis uses solar energy, carbon dioxide, and water to produce energy-storing carbohydrates.what is produced as a waste product?
A. calcium
B. methane
C. oxygen
D. sulfur
Answer: | C |
What is the basic unit of computer memory?
A. Megabyte
B. byte
C. Bit
D. Teraybte
Answer: | B |
What is the first part of the large intestine, where wastes enter from the small intestine?
A. the cecum
B. stomach
C. bowel
D. esophagus
Answer: | A |
Burning fossil fuels produces air pollution and what?
A. oxygen
B. carbon dioxide
C. acid rain
D. liquid dioxide
Answer: | B |
Monosaccharides, particularly glucose, are major nutrients for what?
A. proteins
B. photosynthesis
C. cells
D. lipids
Answer: | C |
Covalent solids are formed by networks or chains of atoms or molecules held together by what?
A. bail bonds
B. gravitational bonds
C. covalent bonds
D. ionic bonds
Answer: | C |
In response to high blood osmolarity, which can occur during dehydration or following a very salty meal, the osmoreceptors signal the posterior pituitary to release this?
A. salt
B. antidiuretic hormone (adh)
C. oxygen
D. adrenaline
Answer: | B |
The grasp reflex in humans is an example of what kind of behavior?
A. trait
B. inclination
C. habit
D. innate
Answer: | D |
Antibiotics can cure most infections that are caused by what?
A. bile
B. bacteria
C. bacterium
D. algae
Answer: | B |
Hydrocarbons are made up of carbon and what else?
A. nitrogen
B. helium
C. silicon
D. hydrogen
Answer: | D |
Archaeal cell walls contain a variety of polysaccharides and proteins but lack what?
A. RNA
B. S-layers
C. peptidoglycan
D. DNA
Answer: | C |
What are lipids' function in relation to nerves?
A. transportation
B. reproduction
C. conservation
D. protection
Answer: | D |
What's the name for the point reached at a ph of 7?
A. acidic point
B. constriction point
C. analogous point
D. equivalence point
Answer: | D |
Crystallization separates mixtures based on differences in what, which usually increases with temperature?
A. density
B. humidity
C. viscosity
D. solubility
Answer: | D |
Pure substances have a constant composition and can only be changed through what?
A. dissolution
B. heating
C. chemical reactions
D. liquid reactions
Answer: | C |
Which water from the equator mixes with cold water from the poles?
A. spring water
B. warm
C. ice water
D. hot
Answer: | B |
In order to determine its molecular formula, it is necessary to know what about the compound?
A. molar mass
B. polar mass
C. lipid mass
D. protons mass
Answer: | A |
What is the term for much bigger evolutionary changes that result in new species?
A. regression
B. breaking away
C. recalibration
D. macroevolution
Answer: | D |
What are the effects of light on plant morphology called?
A. Microsporogenesis
B. Megasporogenesis
C. electrogenesis
D. photomorphogenesis
Answer: | D |
In a magnet, what are the regions called that are the strongest?
A. poles
B. negatives
C. plates
D. positives
Answer: | A |
What kind of muscle cells undergo twitch-type contractions with long refractory periods followed by brief relaxation periods, allowing the heart to fill with blood for the next cycle?
A. skeletal muscle
B. cardiac muscle
C. smooth muscle
D. nervous muscle
Answer: | B |
What is a factor in determining weight but not mass?
A. gravity
B. location
C. function
D. material
Answer: | B |
What occurs when two nonpolar liquids are mixed?
A. polar-nonpolar interactions
B. refracted - nonpolar interactions
C. sediment - nonpolar interactions
D. nonpolar-nonpolar interactions
Answer: | D |
Although much of the heart's basic structure is complete by the end of the fifth week, what fetal structures remain until birth or shortly after?
A. blood shunts
B. umbilical arteries
C. heart shunts
D. renal arteries
Answer: | A |
Because sound waves must move through a medium, there are no sound waves in a what?
A. vacuum
B. liquid
C. gas
D. solid
Answer: | A |
Bicarbonate is the second most abundant anion in the blood. its principal function is to maintain your body’s acid-base balance by being part of these?
A. curb systems
B. compound systems
C. buffer systems
D. stream systems
Answer: | C |
What process involves two cell divisions and produces four haploid cells?
A. mutations
B. Klerokinesis
C. Mitosis
D. meiosis
Answer: | D |
What happens to a chain of amino acids after it reaches a stop codon?
A. digestion stops
B. released from the ribosome
C. metabolism begins
D. stays in ribosome
Answer: | B |
How many electrons can be accommodated in the first electron shell's orbital?
A. none
B. 1
C. 2
D. 3
Answer: | C |
Species distributions are a consequence of both ecological and evolutionary what?
A. fluctuations
B. interactions
C. isolation
D. particles
Answer: | B |
What is the name of the mineral that contains calcium, carbon and oxygen?
A. quartz
B. granite
C. cobalt
D. calcite
Answer: | D |
What medical emergency occurs when a blood clot blocks blood flow to part of the brain, causing death of brain cells?
A. epileptic seizure
B. stroke
C. heart murmur
D. cardiac arrest
Answer: | B |
What are the strongest magnets made?
A. polarized magnets
B. electromagnets
C. natural magnets
D. permanent magnets
Answer: | B |
What vessels supply blood to the myocardium and other components of the heart?
A. rapid arteries
B. coronary arteries
C. specialized arteries
D. surface arteries
Answer: | B |
An endocrine disease usually involves the secretion of too much or not enough of what?
A. neurotransmitter
B. protein
C. hormone
D. metabolism
Answer: | C |
What is it called when a gene at one location (locus) alters the phenotypic expression of a gene at another locus?
A. spontaneous mutation
B. epistasis
C. exogenous
D. epigenesis
Answer: | B |
Called the powerhouses of the cell, what organelles are the site of cellular energy production?
A. cell wall
B. mitochondria
C. mitosis
D. nucleus
Answer: | B |
What is the name of the major sex hormone in females?
A. estrogen
B. testosterone
C. glucose
D. insulin
Answer: | A |
What is the smallest unit of a living thing?
A. proton
B. electron
C. cell
D. organ
Answer: | C |
What kind of metals have perplexing patterns of electron distribution that don’t always follow the electron filling rules?
A. variating
B. solution
C. transition
D. transformation
Answer: | C |
The fact that water in a reservoir is elevated above the ground means that it has what kind of energy?
A. potential
B. kinetic
C. excessive
D. nuclear
Answer: | A |
Rich in protein and nutrients, what abundant group of organisms is being touted as an important human dietary source?
A. insects
B. fungus
C. fruits
D. primates
Answer: | A |
In contrast to metals, electrical insulators are materials that conduct electricity poorly because their valence bands are what?
A. large
B. full
C. empty
D. half-full
Answer: | B |
What model postulates that electrons orbit the nucleus at fixed energy levels?
A. bohr
B. atomic model
C. coreolis
D. Newton's model
Answer: | A |
In the case of the wheelbarrow, the output force or load is between the pivot and the what?
A. velocity force
B. input force
C. density force
D. Driving Force
Answer: | B |
What type of electrons are attracted to the positive nucleus?
A. negative electrons
B. particular electrons
C. passive electrons
D. turbulent electrons
Answer: | A |
Present-day plants that have a complex vascular tissue system are called what kind of plants?
A. vasculated plants
B. cirulatory plants
C. pinworm plants
D. vasuluar plants
Answer: | D |
What tool, used to locate underwater objects, utilizes ultrasound in a way that is similar to echolocation?
A. scanning
B. GPS
C. radar
D. sonar
Answer: | D |
What kind of competition often leads to extinction because the species that is less well adapted gets fewer of the resources that both species need?
A. parasitism
B. intraspecific competition
C. mutualism
D. interspecific competition
Answer: | D |
A nephrologist studies and deals with diseases of what organ?
A. stomach
B. brains
C. kidneys
D. lungs
Answer: | C |
Where is the potential energy of a river the highest at?
A. the ocean
B. the bank
C. the source
D. the middle
Answer: | C |
What are the most numerous and diverse biochemical compounds?
A. Carbohydrates
B. acids
C. lipids
D. proteins
Answer: | D |
Where are most plants firmly rooted?
A. rock
B. grass
C. mineral
D. soil
Answer: | D |
What type of rain dissolves limestone and marble?
A. acid
B. natural
C. sulfur
D. carbon
Answer: | A |
What are materials that have a low resistance to electrical current called?
A. fast conductors
B. electrical conductors
C. resistors
D. electrons
Answer: | B |
What mammalian feature serves functions such as filtration and keeping the body warm?
A. hair
B. sensory organs
C. shivering
D. sweat
Answer: | A |
Higher pressures increase the solubility of what?
A. molecules
B. gases
C. fuels
D. bases
Answer: | B |
What is an important level of organization in ecology and the unit of microevolution?
A. system
B. macro
C. organization
D. population
Answer: | D |
When hot water gently rises to the surface, it creates a what?
A. hot spring
B. volcano
C. steam cloud
D. fissure
Answer: | A |
What is the final stage of aerobic respiration, when energy from the krebs cycle is transferred to atp?
A. cytoplasm transport
B. electron transport
C. glycolysis
D. acetyl-CoA
Answer: | B |
What state of matter has a definite volume, but not a definite shape?
A. mixture
B. solid
C. gas
D. liquid
Answer: | D |
Blood leaves the left ventricle via the what?
A. atrium
B. dorsal chamber
C. capillary
D. aorta
Answer: | D |
What type of animal can be found on every continent except antarctica?
A. amphibians
B. reptiles
C. mammals
D. insects
Answer: | B |
Though viruses are not considered living, they share two important traits with living organisms: they have genetic material and they can undergo what process?
A. sexual reproduction
B. generation
C. learning
D. evolution
Answer: | D |
What is our sun's next stage called?
A. super nova
B. red giant
C. blue giant
D. white giant
Answer: | B |
What type of molecule is carbon dioxide (co2)?
A. planar
B. non-linear
C. linear
D. filter
Answer: | C |
Trimethylamine is one of the substances responsible for the what of spoiled fish?
A. appearance
B. smell
C. feel
D. decay
Answer: | B |
Making ultrasonic clicks is a clever way that some moths respond to attacks by what flying mammals?
A. bees
B. bats
C. birds
D. locusts
Answer: | B |
What do plants respond to in their environment?
A. changes in metal or water
B. changes in sunlight or pressure
C. changes in sunlight or water
D. changes in temperature or water
Answer: | C |
Bone marrow is found inside many bones and produces what?
A. sugar
B. tumors
C. apoptosis
D. lymphocytes
Answer: | D |
One species benefits while the host species is harmed in what type of relationship?
A. parasitism
B. mutualism
C. fungal
D. amensalism
Answer: | A |
What is a compound in which all of the atoms are connected to one another by covalent bonds?
A. compound metal
B. covalent bond element
C. covalent network solid
D. covalent mixture
Answer: | C |
What kind of lakes form when volcanic eruptions create massive holes that fill with water?
A. eruption bowls
B. volcanic cavities
C. crater lakes
D. lava lakes
Answer: | C |
The ovaries produce estradiol and progesterone, which cause secondary sex characteristics and prepare the body for?
A. breathing
B. movement
C. childbirth
D. adulthood
Answer: | C |
Ions move through what to maintain electrical neutrality in the cell?
A. the substrate
B. the protein
C. the plasma
D. the membrane
Answer: | D |
What are the messenger molecules of the endocrine system?
A. enzymes
B. acids
C. neurons
D. hormones
Answer: | D |
What do you call any substance that opposes coagulation?
A. toxin
B. antibodies
C. anticoagulant
D. dissolvent
Answer: | C |
What controls every aspect of plant growth and development to some degree?
A. hormones
B. acids
C. pesticides
D. chlorophyll
Answer: | A |
Making a specific prediction based on a general principle is known as what type of reasoning?
A. common sense reasoning
B. logical reasoning
C. validating reasoning
D. deductive reasoning
Answer: | D |
Ripe fruits are usually red, orange, yellow, or what?
A. blue
B. white
C. purple
D. black
Answer: | C |
What are the lines of force in the electric field around a charged particle called?
A. voltage lines
B. field lines
C. terrain lines
D. ionic zone
Answer: | B |
An electric transformer connects two circuits with an iron core that becomes what?
A. actuator
B. inductive
C. radioactive
D. electromagnet
Answer: | D |
What structure connects the pharynx to the trachea?
A. sternum
B. thyroid
C. aorta
D. larynx
Answer: | D |
The resultant solution will contain the same amount of solute but a greater amount of what?
A. liquid
B. solvent
C. calcium
D. pigment
Answer: | B |
The thin scale-like or flat shape of what cells fits their primary function, to provide a smooth and protective surface?
A. simple epithelium
B. kind epithelium
C. basic epithelium
D. technique epithelium
Answer: | A |
During what phase of breathing does the pressure inside the lungs drops to below atmospheric pressure?
A. ingestion
B. exhalation
C. inhalation
D. conduction
Answer: | C |
What type of climates is malaria commonly found in?
A. tropic and arctic
B. tropical and subtropical
C. arid and arctic
D. tropical and permafrost
Answer: | B |
Plants that live in the desert are called?
A. xerophytes
B. heatophiles
C. xerozoans
D. sporozoans
Answer: | A |
Dolphins are what type of animal?
A. fish
B. reptile
C. whale
D. mammal
Answer: | D |
What is the energy of moving matter?
A. binary energy
B. residual energy
C. potential energy
D. kinetic energy
Answer: | D |
The two parts of photosynthesis photosynthesis takes place in two stages: the light-dependent reactions and which cycle?
A. dark cycle
B. klein cycle
C. calvin cycle
D. colors cycle
Answer: | C |
In an atom, what two major types of particles are located in the nucleus?
A. ions and electrons
B. protons and neutrons
C. electrons and neutrons
D. molecules and neutrons
Answer: | B |
What is the first part of the large intestine, where wastes enter from the small intestine?
A. spleen
B. cecum
C. tectum
D. sacrum
Answer: | B |
Each pollen grain has two coverings: the exine (thicker, outer layer) and the what?
A. cytoplasm
B. intine
C. pollen tube
D. tube nucleus
Answer: | B |
In stars like our sun, hydrogen atoms join together to create what?
A. water molecule
B. helium atom
C. oxygen atom
D. iron atom
Answer: | B |
How do bacteria reproduce?
A. natural fission
B. binary fission
C. residual fission
D. multiple fission
Answer: | B |
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