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In what kind of bond does one atom contribute both of the electrons in the shared pair?
|
a covalent bond
|
sciq
|
The human male and female reproductive cycles are controlled by the interaction of hormones from the hypothalamus and anterior pituitary with hormones from reproductive tissues and organs. in both sexes, the hypothalamus monitors and causes the release of hormones from this?
|
anterior pituitary gland
|
sciq
|
In the human body, what do you call the intersection where the paths for air and food cross.?
|
pharynx
|
sciq
|
In eukaryotes, the cell cycle consists of a long preparatory period, called __________ before undergoing cell division.
|
interphase
|
sciq
|
The lungs are a series of ever-narrowing tubes that end in a myriad of tiny sacs called what?
|
alveoli
|
sciq
|
Reactive elements are able to combine more what with other elements?
|
easily
|
sciq
|
Most of the genes in the eukaryotic cell are found where?
|
the nucleus
|
sciq
|
How the individuals in a population are spread throughout their habitat is referred to as what?
|
population distribution
|
sciq
|
How does the bacteria look when seen with the naked eye?
|
slimy smear
|
sciq
|
What is the modern periodic table based on?
|
atomic number
|
sciq
|
What structure does methane have?
|
three dimensional tetrahedra
|
sciq
|
Which forces hold particles together in more ordered states?
|
intermolecular
|
sciq
|
What property of warm air causes it to rise above cold air?
|
lower density
|
sciq
|
Which type of tides are created when the sun and moon's tides match?
|
spring tides
|
sciq
|
Like all tetrapods except birds and mammals, frogs possess a heart with what structure?
|
three chambers
|
sciq
|
What do the ears have to be protected from in order to avoid hearing loss?
|
loud sounds
|
sciq
|
Much of what type of radiation that strikes the planet is reflected back into space?
|
solar radiation
|
sciq
|
What does some amphibians have as juveniles but not as adults living on land?
|
lateral line system
|
sciq
|
Sucrose consists of one molecule of glucose and one molecule of what else?
|
fructose
|
sciq
|
What gas, that is dissolved in solution, is used in carbonated beverages?
|
carbon dioxide
|
sciq
|
What is the message sent from the nucleus to the ribosome?
|
mrna
|
sciq
|
A sequence of amino acids in single polypeptide is the primary structure for what?
|
proteins
|
sciq
|
White blood cells called what travel to areas of the body that are inflamed?
|
phagocytes
|
sciq
|
What term is used to describe a cross between two individuals that have different traits?
|
hybridization
|
sciq
|
Sickle-cell anemia, leukemia, lymphoma, and hemophilia are examples of what types of disease?
|
blood disease
|
sciq
|
What are most metal objects made of?
|
metal alloys
|
sciq
|
Compared to red light, blue light has a shorter what?
|
wavelength
|
sciq
|
Light with the longest wavelengths is called what?
|
infrared light
|
sciq
|
What term describes a colloidal dispersion of a liquid in either a liquid or a solid?
|
emulsion
|
sciq
|
What is a measure of the size of sound waves?
|
amplitude
|
sciq
|
What do you call an animal that feeds on other animals?
|
carnivore
|
sciq
|
Flowers pollinated by what means generally lack brightly colored parts?
|
wind
|
sciq
|
The earliest animals were which kind of invertebrates?
|
aquatic
|
sciq
|
Humans are unique in their ability to alter their environment with the conscious purpose of increasing what, which acts as a limiting factor on populations in general?
|
carrying capacity
|
sciq
|
Many plants generate root pressure during which phase?
|
growing season
|
sciq
|
What do you call an abnormal mass formed when cells divide uncontrollably?
|
tumor
|
sciq
|
A group of atoms that results when one hydrogen atom is removed from an alkane is referred to as what?
|
alkyl group
|
sciq
|
Physical and chemical differences help ecologists distinguish between freshwater and marine types of what?
|
biomes
|
sciq
|
What is another term for movable joints?
|
synovial
|
sciq
|
What is the energy of motion called?
|
kinetic energy
|
sciq
|
What is the general name for a solid material that is formed via a natural process?
|
mineral
|
sciq
|
What are the two types of properties that matter has?
|
physical and chemical
|
sciq
|
All organisms must adapt to what in order to survive?
|
environment
|
sciq
|
Some animals prepare for the long winter by going into what?
|
hibernation
|
sciq
|
Hair is a component of which bodily system?
|
integumentary system
|
sciq
|
Insulin and glucagon help keep blood glucose levels in the normal range because of what type of effects?
|
antagonistic
|
sciq
|
Isotopes have different number of these in their nuclei?
|
neutrons
|
sciq
|
The third line of defense of the immune system is called?
|
the immune response
|
sciq
|
Where is the food supply and embryo stored in a seed?
|
hull
|
sciq
|
What color light is actually the absence of electromagnetic waves in the visible spectrum, for humans?
|
black light
|
sciq
|
What is just below the cerebrum and coordinates body movements?
|
cerebellum
|
sciq
|
All cells undergo what during a lifetime, but when this process is out of control, cancer results?
|
cell division
|
sciq
|
Like animals, cyanobacteria possess what kind of biological rhythm?
|
circadian rhythm
|
sciq
|
How can nuclear fusion in stars be simulated?
|
particle accelerators
|
sciq
|
What is the role of the sodium ion in the neutralization reaction of sodium flouride?
|
spectator ion
|
sciq
|
What is the second state of photosynthesis?
|
calvin cycle
|
sciq
|
How much can the bacteria in your gut weigh?
|
2 pounds
|
sciq
|
When thinking of the rate at which two gases mix, it is inverse proportional to the density of what?
|
gas
|
sciq
|
A turbine using tides in the ocean can create what type of energy?
|
electricity
|
sciq
|
The pollen grain absorbs water and does what after it adheres to the stigma of a carpel?
|
germinates
|
sciq
|
Some isotopes are stable indefinitely, while others are radioactive and do what through a characteristic form of emission?
|
decay
|
sciq
|
What often form symbiotic associations with much larger organisms?
|
prokaryotes
|
sciq
|
Which kind of genetics approach involves mutating or deleting genes provides researchers with clues about gene function?
|
reverse genetics
|
sciq
|
How does the diaphragm look like when it is at rest?
|
dome-shaped
|
sciq
|
Mammals may either be herbivores, omnivores or what else?
|
herbivores
|
sciq
|
How many chambers does an amphibian heart have?
|
three
|
sciq
|
High consumption of saturated fats is linked to an increased risk of what disease?
|
cardiovascular disease
|
sciq
|
What can be identified as an element, a compound, or a mixture?
|
matter
|
sciq
|
Worldwide, viruses seem to play a role in what percentage of the cases of human cancer?
|
15%
|
sciq
|
After citric acid forms, it goes through a series of reactions that release what, which is then captured in special molecules?
|
energy
|
sciq
|
What type of biomes are found in the salt water of the ocean?
|
marine
|
sciq
|
The three stages of transcription are initiation, elongation, and what?
|
termination
|
sciq
|
What part of blood releases clotting factors?
|
platelets
|
sciq
|
If two populations do not mate and produce fertile offspring, what results?
|
separate species
|
sciq
|
Compared with the molecules of many other substances, molecules of water are strongly attracted to what?
|
each other
|
sciq
|
One seismogram indicates the distance to the what?
|
epicenter
|
sciq
|
Deserts and forests are examples of what type of biome?
|
terrestrial
|
sciq
|
The group 18 gases that have 8 valence electrons are referred to as what type of gases?
|
noble
|
sciq
|
How many pairs of chromosomes are there?
|
23
|
sciq
|
What molecules with a nitrogen base are the basic components of nucleic acids?
|
nucleiotides
|
sciq
|
What term is used to describe is the increased or decreased speed of movement of an organism in response to a stimulus?
|
orthokinesis
|
sciq
|
The same reaction regenerates pyruvate, which is transported to which cells?
|
mesophyll
|
sciq
|
What are groups of atoms that behave as a single unit called?
|
molecules
|
sciq
|
What are proteins made up of?
|
amino acids
|
sciq
|
What determines which type of precipitation falls?
|
air temperature
|
sciq
|
What is the sum of the massess of the atoms in a molecule?
|
molecular mass
|
sciq
|
The breasts contain what to give milk to feed a baby?
|
mammary glands
|
sciq
|
Thermal, radiant, electrical, nuclear, and chemical are all types of what?
|
energy
|
sciq
|
What type of physics explains the behavior of visible light and electromagnetic waves?
|
optics
|
sciq
|
When we consider a chemical reaction, we need to take into account both the system and what?
|
sorroundings
|
sciq
|
White light is a mixture of all wavelengths of what?
|
visible light
|
sciq
|
In how many ways ca a living organism obtain chemical energy
|
two
|
sciq
|
What is the term for the skeletal structure of the head that supports the face and protects the brain?
|
cranium (skull)
|
sciq
|
What is the diploid number for fruit flies?
|
8
|
sciq
|
Which component of the electron transport chain does cyanide inhibit?
|
cytochrome c oxidase
|
sciq
|
Untreated chlamydia can lead to pelvic inflammatory disease, which affects what organ system?
|
female reproductive system
|
sciq
|
What fatty material inside arteries can restrict blood flow in the artery?
|
plaque
|
sciq
|
Red bone marrow, tonsils, spleen, and thymus gland are considered organs of what system?
|
lymphatic
|
sciq
|
When oxygen is not bound to heme and the partial pressure of oxygen is low, hemoglobin readily binds to what?
|
carbon dioxide
|
sciq
|
What kind of molecule is made from one or more long chains of amino acids?
|
protein molecule
|
sciq
|
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