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sciq
What kind of current flows in just one direction?
physical current
Alternating current
direct current
slow current
direct current
sciq
What spreads sti during sexual contact?
parasites
blood
pathogens
viruses
pathogens
sciq
The entire volume of what is filtered through the kidneys about 300 times per day?
urine
saliva
blood
gastric juice
blood
sciq
In which type of cells are most organelles not found?
endoplasmic cells
prokaryotic cells
heterogeneous cells
eukaryotic cells
prokaryotic cells
sciq
What is the measure of electric current?
intensity
ampheres
watts
volts
ampheres
sciq
During what phase of breathing does the pressure inside the lungs drops to below atmospheric pressure?
inhalation
ingestion
conduction
exhalation
inhalation
sciq
What is the apt term for the very slow movement of rock and soil down a hillside?
glide
landslide
drop
creep
creep
sciq
A sprain is a strain or tear in what part of the body?
a ligament
stomach
torso
skeleton
a ligament
sciq
Unlike wood and glass, steel is an example of a material that responds to what force?
electromagnetic
thermal
magnetic
kinetic
magnetic
sciq
In which direction does heat always flow through objects?
from low to high
from cooler to hotter
from hotter to cooler
from left to right
from hotter to cooler
sciq
What makes up 99 percent of air?
dioxide and nitrogen
oxygen and dioxide
phosphorus and oxygen
nitrogen and oxygen
nitrogen and oxygen
sciq
Where does much of the blood that enters the atria flow?
arteries
ventricles
lungs
muscles
ventricles
sciq
Burning forests, growing rice and raising livestock all cause a release of what into the atmosphere?
oxide gases
carbonate gases
glucose gases
greenhouse gases
greenhouse gases
sciq
Since warmer molecules have more energy, they are more what?
inactive
abundant
dense
active
active
sciq
Sexually reproducing organisms alternate between which stages?
haploid and diploid
binary and diploid
diploid and traploid
binary and haploid
haploid and diploid
sciq
Each megasporangium has a single functional one of what?
megaspore
cocklebur
antispore
spicule
megaspore
sciq
What chemical element is required for a combustion reaction ?
nitrogen
oxygen
helium
carbon
oxygen
sciq
What do you call an object that attracts certain materials such as iron?
electron
magnet
antenna
neutron
magnet
sciq
Geiger counters can be used to detect what, in general?
seismic load
convection
evaporation
radiation
radiation
sciq
Essential minerals that the body needs in tiny quantities are called what?
byproduct minerals
draw minerals
flux minerals
trace minerals
trace minerals
sciq
What receives blood in the heart?
the epidermis
the atria
ventricle
chamber
the atria
sciq
One of the most advanced uses of what in medicine is the positron emission tomography scanner, which detects the activity in the body of a very small injection of radioactive glucose?
quarks
radionuclides
membranes
radioisotopes
radioisotopes
sciq
What are commonly used to control insect pests, but can have harmful effects on the environment?
insecticides
fertilizers
Herbicides
toxins
insecticides
sciq
The only obvious difference between boys and girls at birth is what type of organs?
digestive
respiratory
nervous
reproductive
reproductive
sciq
What type of carbon dioxide levels have been rising for the past several decades?
aqueous
magnetic
atmospheric
subatomic
atmospheric
sciq
Hyperparathyroidism results from an overproduction of what?
inhibited hormone
tharayroid hormone
elevated hormone
parathyroid hormone
parathyroid hormone
sciq
Digestive enzymes secreted in the acidic environment (low ph) of the stomach help break down what?
cells
particles
molecules
proteins
proteins
sciq
From the pharynx, air next passes through what structure, also known as the voice box because it contains vocal cords?
diaphram
pancreas
trachea
larynx
larynx
sciq
Digestion and respiration are both facilitated by the pharynx, more commonly called the what?
nose
sinus
esophagus
throat
throat
sciq
What is the fertilization step in the sexual reproduction of plants?
evolution
Fornications
pollination
hibernation
pollination
sciq
For an exothermic chemical reaction, energy is given off as reactants are converted to what?
imports
forms
exports
products
products
m1_mnlp
Suppose that you can prove the security of your symmetric encryption scheme against the following attacks. In which case is your scheme going to be the \textbf{most} secure?
Key recovery under known plaintext attack.
Decryption under known plaintext attack.
Decryption under chosen ciphertext attack.
Key recovery under chosen ciphertext attack.
Decryption under chosen ciphertext attack.
sciq
In the case of the thyroid hormone pathway, thyroid hormone itself carries out what kind of feedback?
effective
positive
continued
negative
negative
sciq
What can be combined with an amine to form an amide?
acetic acid
carboxylic acid
carbon dioxide
ketones
carboxylic acid
sciq
Where does most natural gas come from?
alchemy
recycled cooking oil
wells that produce petroleum
oceans
wells that produce petroleum
sciq
What do plants do to prevent water loss at night?
shed their petals
close their stems
close their leaves
open their petals
close their leaves
sciq
What is your body made up of?
skin
millions of elements
trillions of cells
energy
trillions of cells
sciq
Which type of pressure forces fluid out of the capillary?
hydrostatic
gas
combustion
air
hydrostatic
sciq
With the exception of water, what accounts for more mass than any other component of living organisms?
fats
hormones
proteins
nervous tissue
proteins
sciq
What must happen for two ions to form an ionic bond?
two ions need to have the same charge
Two ions need to be the same size
two ions need to have opposite charges
two ions need to have neutral charges
two ions need to have opposite charges
sciq
Shivering and adipose tissue called brown fat are used by mammals in particular to produce what?
energy
blood
nutrition
heat
heat
sciq
What are the proteins called that speed up biochemical reactions in cells?
peptides
carbohydrates
enzymes
hormones
enzymes
sciq
Scientists utilize what natural process to teach cranes born in captivity to migrate along safe routes?
expediting
neuroimaging
imprinting
natural selection
imprinting
sciq
Chemical equations need to be balanced to satisfy the law of what?
material of matter
speed of matter
glow of matter
conservation of matter
conservation of matter
sciq
What is the smallest unit capable of life known as?
organism
a cell
insect
living thing
a cell
sciq
What effect in the atmosphere ensures that the earth maintains the correct temperature to support life?
greenhouse effect
smog effect
coriolis effect
ozone effect
greenhouse effect
sciq
The end result of diffusion is an equal concentration, or equilibrium , of molecules on both sides of what?
the organism
the membrane
the cell
the organelle
the membrane
sciq
Transgenic animals are animals that have incorporated a gene from another species into their what?
enemies
habitats
genome
food
genome
sciq
What are the two major types of seed plants called?
perennials and annuals
deciduous and evergreen
gymnosperms and angiosperms
flowers and fruits
gymnosperms and angiosperms
sciq
Compound light microscopes use lenses to do what?
twist light
stop light
burn light
focus light
focus light
sciq
Unlike an adult sponge, what stage is motile due to cilia that propel it through water?
pupa
zygote
larva
parasite
larva
sciq
In what form of matter is hydrogen at room temperature?
gas
dissolved
solid
liquid
gas
sciq
A molecule has two structures that can be generated. what is this called?
congruence
isomerism
ethnocentrism
resonance hybrids
isomerism
sciq
What are clouds that form on the ground called?
canopy
fog
smoke
haze
fog
sciq
The ends of linear chromosomes are maintained by the action of which enzyme?
pepsin
cytokine
insulin
telomerase
telomerase
sciq
Similarity of crystal structures is used to categorize what non-living materials?
minerals
grains
corals
salts
minerals
sciq
Van der waals forces are weak interactions between molecules that involve what?
atoms
photons
particles
dipoles
dipoles
sciq
What type of traits are features that are passed from one generation to the next called?
inherited traits
familial traits
genetic traits
generational traits
inherited traits
sciq
Sodium and chloride ions have equal but what charges?
simple
path
opposite
positive
opposite
sciq
Where does digestion take place within an incomplete digestive system?
abdomen
gastrovascular cavity
lumbar region
central nervous system
gastrovascular cavity
sciq
In what process is atp created by glycolysis, without oxygen?
fermentation
oxidation
sedimentation
condensation
fermentation
sciq
What type of bonds are the attractive forces between the positively charged nuclei of the bonded atoms and one or more pairs of electrons that are located between the atoms?
reactive
gravitational
covalent
active
covalent
sciq
What is the average number of individuals per unit of area or volume called?
population density
population count
crowdedness
population structure
population density
sciq
What is the largest part of the brain?
temporal lobe
cerebrum
pituitary gland
hypothalamus
cerebrum
sciq
Seed plants that produce seeds in the ovaries of their flowers are known as what?
gymnosperms
angiosperms
conifers
spores
angiosperms
sciq
The most basic division of land plants is between what type of plants?
deciduous and evergreen
perennial and annual
nonvascular and vascular
succulents and conifers
nonvascular and vascular
sciq
What organ contributes about 60% of the volume of semen ?
complete vesicles
seminal vesicles
long vesicles
cilia
seminal vesicles
sciq
What is necessary for new alleles to be created?
cross-pollination
new rna
new mutations
new frequencies
new mutations
sciq
What classification system was developed by a swedish botanist trying to classify all known living things?
plantological system
bionumerical system
linnaean system
taxonomical system
linnaean system
sciq
Where does cellular respiration occur?
Golgi apparatus
chloroplasts
mitochondria
nucleus
mitochondria
sciq
How many moons does pluto have?
three
six
four
two
three
sciq
What type of shape does sodium chloride have?
round
cubic
oblong
trianguler
cubic
sciq
What is composed of a calcium cation and a nitrate anion?
calcium nitrate
dynamite
calcium carbonate
nitrous oxide
calcium nitrate
sciq
What do scientist's believe mercury's core is mostly made of?
helium gas
quicksilver
melted iron
water
melted iron
sciq
A skeleton that consists of hard, mineralized structures located within the soft tissue of organisms is called what?
hydrostatic skeleton
endoskeleton
calcium deposits
exoskeleton
endoskeleton
sciq
What is the alkaline hydrolysis reaction of an ester called?
fermentation
resorption
instantiation
saponification
saponification
sciq
What kind of metals have perplexing patterns of electron distribution that don’t always follow the electron filling rules?
variating
transformation
transition
solution
transition
m1_mnlp
Which of the following ciphers is based on arithmetics over the finite field $\mathrm{GF}(2^8)$?
AES
A5/1
RC4
DES
AES
sciq
Which period after birth has the most rapid growth?
infancy
adolescence
early childhood
middle childhood
infancy
sciq
What is the term for a solution that resists dramatic changes in ph?
buffer
stable
neutral
inert
buffer
sciq
Human actions such as plowing, logging, construction and other actions contribute to what kind of erosion?
weathering
soil erosion
flooding
wind erosion
soil erosion
sciq
What is the force that slows down or stops motion?
tension
thrust
friction
resistance
friction
sciq
What is another name for nearsightedness?
astigmatism
presbyopia
myopia
hyperopia
myopia
sciq
What is a sac-like organ that stores urine?
the colon
the urinary bladder
the urinary liver
the small intestine
the urinary bladder
sciq
What are materials that are good conductors of thermal energy called?
atmospheric conductors
reflective conductors
thermal conductors
geospatial conductors
thermal conductors
sciq
What is the tube-like device used to reliably measure lower levels of radiation?
Richter scale
geiger counter
MRI machine
weber counter
geiger counter
sciq
All matter in the universe is composed of one or more unique pure substances called what?
atoms
molecules
elements
compounds
elements
sciq
What is the average kinetic energy of particles of matter?
temperature
magnetism
momentum
friction
temperature
sciq
What is the term for the process in which living things with beneficial traits produce more offspring than others do?
natural selection
natural survival
natural process
natural variety
natural selection
sciq
What are the simplest types of carbon-based compounds?
Microbes
particles
Cells
hydrocarbons
hydrocarbons
sciq
What is the study of structure, properties, and interactions of matter?
biology
chemistry
geology
petrology
chemistry
sciq
There are how many visual clues to indicate a chemical reaction?
four
three
five
seven
four
sciq
The vertebrate endoskeleton is made of bone and what tough, flexible tissue?
cartilage
collagen
synovial tissue
cuticle
cartilage
sciq
What distinctive configuration of dna demonstrates the base-pairing nature of the bases?
single helix
double loop
double helix
triple helix
double helix
sciq
What is the process of drawing general conclusions based on many pieces of evidence?
primitive reasoning
quantum reasoning
experimental reasoning
inductive reasoning
inductive reasoning
sciq
What is the term for the process in which two atomic nuclei fuse together to make a single nucleus?
absorption
fusion
binding
fission
fusion
sciq
The number of electron pairs that hold two atoms together is called?
nuclear order
proton order
bond order
electron order
bond order
sciq
What is a biochemical compound that is a chain of amino acids called?
lipids
proteins
hormones
DNA
proteins
m1_mnlp
Tick the \textbf{true} assertion. MAC is \ldots
\ldots a Message Authentication Code.
\ldots the name of a dish with chili.
\ldots the encryption of KEY with the Ceasar cipher.
\ldots a computer.
\ldots a Message Authentication Code.
sciq
What feature of the spine helps with flexibility and strength?
shape
arrangement
angle
curves
curves