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Proteins are categorized according to shape and **blank** property , which correlates with it
[ "viscosity", "size", "salinity" ]
solubility
present in all organic molecules is **blank**
[ "oxygen", "sodium", "hydrogen" ]
carbon
A sample of matter that has the same physical and chemical properties throughout itself is known as **blank**
[ "antimatter", "essence", "molecule" ]
substance
**blank** are located along convergent and divergent plate boundaries
[ "mezas", "megaliths", "dunes" ]
volcanoes
Hydrogen-based fuel cells were and are used to provide **blank** for manned space vehicles
[ "light", "magnetism", "gravity" ]
electricity
plants that are adapted to very dry environments are called **blank**
[ "succulents", "pores", "sporozoans" ]
xerophytes
**blank** neurons carry nerve impulses from sense organs and internal organs to the central nervous system
[ "vascular", "autonomic", "axons" ]
sensory
Temperature and precipitation determine the types of **blank** that can grow in an area , in turn affecting the animals that live there
[ "roots", "building", "birds" ]
plants
the transfer of heat by physical contact is **blank**
[ "oxidation", "inhibition", "diffusion" ]
conduction
the process in which unspecialized cells become specialized in structure and function to perform certain tasks in the body is **blank**
[ "speciation", "transcription", "mutation" ]
differentiation
there are **blank** types of basic sensory receptors
[ "six", "four" ]
five
the force of attraction that holds together two atoms that share a pair of valence electrons is **blank**
[ "polar", "hydrogen", "metallic" ]
covalent
**blank** describes the distance between two corresponding points on adjacent waves
[ "frequency", "threshold", "variation" ]
wavelength
**blank** break down dead organisms and other organic waste and release inorganic molecules back to the environment called
[ "detritivores", "nematodes", "carnivores" ]
decomposers
The variety of cell shapes seen in prokaryotes and eukaryotes reflects the functions that each **blank** has
[ "proteins", "life", "organ" ]
cell
the science of classifying living things is called **blank**
[ "methodology", "terminology", "botany" ]
taxonomy
Illustrating how form follows function , long , slender protein strands that make up **blank** tissue are essential for contracting and relaxing
[ "tendons", "veins", "ligaments" ]
muscle
**blank** makes marginal lands unsuitable for farming
[ "flood", "pestilence", "disease" ]
drought
The three parts of the human small intestine is the duodenum , jejunum , and **blank**
[ "appendix", "colon", "cecum" ]
ileum
the term for the ability of a fluid to exert an upward force on any object placed in it is **blank**
[ "viscosity", "density", "resonance" ]
buoyancy
A fuel cell is a galvanic cell that requires a constant external supply of **blank**
[ "generators", "electricity", "complexes" ]
reactants
one of the most frequently studied cartilaginous fish is **blank**
[ "whales", "dolphins", "manatees" ]
sharks
**blank** forms igneous rock , flows out in rivers of lava when it reaches the surface
[ "granite", "soil", "fertilizer" ]
magma
Certain air pollutants form **blank** liquid when dissolved in water droplets in the air
[ "water", "base", "citrus" ]
acid
the most abundant in the universe is **blank**
[ "oxygen", "carbon", "helium" ]
hydrogen
Spongy bone is found inside bones and is lighter and less dense than compact bone because it is **blank**
[ "amorphous", "pliable", "fibrous" ]
porous
Animals are heterotrophs , which means that they can not make their own **blank**
[ "fuel", "energy", "habitat" ]
food
the electron domain geometry of ammonia is **blank**
[ "membranes", "atoms", "neurons" ]
tetrahedral
In humans , fertilization occurs soon after the oocyte leaves **blank**
[ "egg", "placenta", "testes" ]
ovary
Oxygen , carbon dioxide , atp , and nadph are reactants in **blank** process that plants use to produce food
[ "glycolysis", "absorbtion", "chlorophyll" ]
photosynthesis
the basic unit of the structure and function of living things is **blank**
[ "atom", "molecule", "nucleus" ]
cell
When a nerve impulse reaches the end of an axon , **blank** are the chemicals released by the axon called
[ "neurons", "electrolytes", "receptors" ]
neurotransmitters
ecosystems absorb **blank** on the earth
[ "water", "hydrogen", "fuel" ]
energy
populations can grow under **blank** exponentially
[ "pleasant", "useful", "lush" ]
ideal
Malonate plays **blank** negative role on the enzyme succinate dehydrogenase
[ "catalyst", "pathway", "receptor" ]
inhibitor
**blank** mass extinctions have occurred throughout earth 's history
[ "six", "four", "three" ]
five
**blank** refers to the ability to change or move matter and is required by all life processes and living things
[ "fuel", "gravity", "enthalpy" ]
energy
we call the visible part of the electromagnetic spectrum **blank**
[ "weight", "radio", "electricity" ]
light
**blank** of crust is made of basalt lavas that flow onto the seafloor
[ "exotic", "endotopic", "warm" ]
oceanic
a large molecule with many repeating units is **blank**
[ "cells", "supermolecule", "plasma" ]
polymer
Small nonprotein , water-soluble molecules or ions called second messengers often play a role in **blank** kind of pathways
[ "creating", "creating", "inhibiting" ]
signaling
many mammals control their body temperature by **blank**
[ "dieting", "homeostasis", "itching" ]
sweating
The invention of the wheel is an example of **blank** , which has the goal of solving human problems
[ "industry", "concept", "evolution" ]
technology
a partial body cavity is filled **blank** in roundworms with fluid
[ "abdomen", "cocklebur", "spicule" ]
pseudocoelom
Most of the energy used by living things comes either directly or indirectly from **blank**
[ "water", "horizon", "earth" ]
sun
When present in large volumes , **blank** color hue can water emit
[ "white", "pink", "yellow" ]
blue
**blank** prevents new ovarian follicles from developing and suppresses uterine contractility
[ "germination", "glucose", "estrogen" ]
progesterone
The majority of elements , including iron and copper , are of **blank** type
[ "oils", "acids", "minerals" ]
metals
The bilaterians are divided into deuterostomes and **blank**
[ "protozoa", "progestins", "gymnosperms" ]
protostomes
it is called **blank** when birds keep their eggs warm while the embryos inside develop
[ "insulation", "spawning", "fertilization" ]
incubation
**blank** leaves behind crescent-shaped scars on a hillside and may be caused by a layer of slippery , wet clay underneath the rock and soil on a hillside
[ "creep", "slide", "shearing" ]
slump
the organ system that brings oxygen into the body and releases carbon dioxide is **blank**
[ "liver", "brain", "kidneys" ]
lungs
the union of the cytoplasms of two parent mycelia is known as **blank**
[ "plasmology", "spirogyra", "xerophyte" ]
plasmogamy
The ladybug and the frog both start as eggs and go through **blank** process
[ "transition", "parthenogenesis", "proboscis" ]
metamorphosis
In multicellular organisms , essential biological functions are carried out by **blank**
[ "atoms", "cells", "molecules" ]
organs
Fahrenheit , celsius , and kelvin are all units which measure **blank**
[ "brightness", "radiation", "precipitation" ]
temperature
the smallest particles of matter are **blank**
[ "ions", "molecules", "electrons" ]
atoms
Hydrophilic molecules generally avoid **blank** other kinds of molecules
[ "aqueous", "lipophilic", "neutral" ]
hydrophobic
**blank** describes reproducing by external fertilization after the female sheds large numbers of small eggs
[ "glandular", "glaucous", "homozygous" ]
oviparous
While ecosystems need a constant input of energy for their organisms , **blank** do ecosystems recycle
[ "water", "light", "food" ]
matter
the term for something is changing from water to ice is **blank**
[ "evaporation", "boiling", "melting" ]
freezing
an individual with more than the correct number of chromosome sets is called **blank**
[ "autotrophs", "autosome", "diploid" ]
polyploid
Most of the fresh water on earth is tied up in a solid form . **blank** are they called
[ "sediments", "lakes", "oceans" ]
glaciers
Hertz proved that **blank** type of waves travel at the speed of light
[ "sound", "seismic", "tsunamis" ]
electromagnetic
**blank** in removing phosphorylated amino acids from proteins
[ "sucrose", "carbonate", "peptide" ]
phosphatase
Electricity consists of a constant stream of **blank** tiny particles
[ "atoms", "quarks", "ions" ]
electrons
a solution with a ph is lower than 7 called **blank**
[ "basic", "neutral", "dioxide" ]
acid
**blank** interprets signals , while the motor division sends signals
[ "kinetic", "olfactory", "automatic" ]
sensory
the process of filtering waste from the kidneys is **blank**
[ "virus", "stones", "inflammation" ]
dialysis
The four basic types of tissue are epithelial , muscle , connective , and **blank**
[ "regulatory", "digestive", "circulatory" ]
nervous
Carnivores that eat herbivores are **blank** kind of consumers
[ "tertiary", "primary", "quaternary" ]
secondary
In the case of the moose , predation is an additional factor that regulates **blank**
[ "speed", "color", "weight" ]
population
Changes from a less-ordered state to a more-ordered state ( such as a liquid to a solid ) are always **blank**
[ "unbalanced", "reactive", "endothermic" ]
exothermic
When a meteoroid reaches earth , **blank** is the remaining object called
[ "comet", "meteor", "orbit" ]
meteorite
Alpha emission is a type of **blank**
[ "radiation", "heat", "light" ]
radioactivity
the stored food in a seed called is **blank**
[ "pollin", "membrane", "larval" ]
endosperm
Boron only occurs naturally in compounds with **blank** element
[ "helium", "nitrogen", "carbon" ]
oxygen
**blank** link exchange surfaces with cells throughout the body
[ "vascular", "pulmonary", "nervous" ]
circulatory
Most of the chemical reactions in the body are facilitated by **blank**
[ "proteins", "vitamins", "carbohydrates" ]
enzymes
the termination of a pregnancy in progress is called **blank**
[ "contraception", "miscarriage", "delivery" ]
abortion
Testing **blank** usually requires making observations or performing experiments
[ "variables", "conclusion", "homeostasis" ]
hypothesis
Water molecules move about continuously due to **blank** type of energy
[ "seismic", "potential", "optical" ]
kinetic
**blank** is defined as a change in the inherited traits of organisms over time
[ "variation", "divergence", "generation" ]
evolution
angiosperms produce seeds in flowers **blank**
[ "germs", "cones", "testes" ]
ovaries
All living things need air and **blank** to survive
[ "stimuli", "habitat", "ecosystem" ]
water
The cells of all eukarya have a **blank**
[ "chloroplast", "epidermis", "necrosis" ]
nucleus
**blank** of plate boundaries produce huge mountain ranges in the ocean basin
[ "coherent", "parallel", "tractional" ]
divergent
Interstitial carbides are produced by the reaction of most transition metals at high temperatures with **blank** element
[ "hydrogen", "oxygen", "nitrogen" ]
carbon
Fungus-like protist saprobes play **blank** role in a food chain and are specialized to absorb nutrients from nonliving organic matter , such as dead organisms or their wastes
[ "aphids", "Soil", "fluxes" ]
decomposers
the sites of protein synthesis or assembly are **blank**
[ "chloroplasts", "chromosomes", "plasma" ]
ribosomes
primarily the result of plate tectonic motions is **blank**
[ "eruption", "tsunamis", "volcanoes" ]
earthquake
a group of neuron cell bodies in the periphery is called **blank**
[ "crystals", "organism", "gangism" ]
ganglion
most of our food come from **blank**
[ "microbes", "lichen", "gymnosperms" ]
angiosperms
Gases are most ideal at high temperature and **blank** pressure
[ "absolute", "high", "stable" ]
low
**blank** serve as catalysts in most of the biochemical reactions that take place in organisms
[ "hormones", "carbohydrates", "iseotrops" ]
enzymes
A pulley changes the direction of the force t exerted by the cord without changing its **blank**
[ "longitude", "latitude", "position" ]
magnitude
In the absence of air resistance , all falling objects accelerate at the same rate due to **blank** force
[ "velocity", "weight", "motion" ]
gravity
In the presence of oxygen , hydrogen can interact to make **blank**
[ "carbon", "helium", "acid" ]
water
The angle at which light bends when it enters a different medium is known as **blank**
[ "bounce", "frequency", "resonance" ]
refraction
the energy is emitted **blank** by the sun
[ "seismic", "magnetic", "thermal" ]
electromagnetic