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Proteins are categorized according to shape and **blank** property , which correlates with it

solubility

present in all organic molecules is **blank**

carbon

A sample of matter that has the same physical and chemical properties throughout itself is known as **blank**

substance

**blank** are located along convergent and divergent plate boundaries

volcanoes

Hydrogen-based fuel cells were and are used to provide **blank** for manned space vehicles

electricity

plants that are adapted to very dry environments are called **blank**

xerophytes

**blank** neurons carry nerve impulses from sense organs and internal organs to the central nervous system

sensory

Temperature and precipitation determine the types of **blank** that can grow in an area , in turn affecting the animals that live there

plants

the transfer of heat by physical contact is **blank**

conduction

the process in which unspecialized cells become specialized in structure and function to perform certain tasks in the body is **blank**

differentiation

there are **blank** types of basic sensory receptors

five

the force of attraction that holds together two atoms that share a pair of valence electrons is **blank**

covalent

**blank** describes the distance between two corresponding points on adjacent waves

wavelength

**blank** break down dead organisms and other organic waste and release inorganic molecules back to the environment called

decomposers

The variety of cell shapes seen in prokaryotes and eukaryotes reflects the functions that each **blank** has

cell

the science of classifying living things is called **blank**

taxonomy

Illustrating how form follows function , long , slender protein strands that make up **blank** tissue are essential for contracting and relaxing

muscle

**blank** makes marginal lands unsuitable for farming

drought

The three parts of the human small intestine is the duodenum , jejunum , and **blank**

ileum

the term for the ability of a fluid to exert an upward force on any object placed in it is **blank**

buoyancy

A fuel cell is a galvanic cell that requires a constant external supply of **blank**

reactants

one of the most frequently studied cartilaginous fish is **blank**

sharks

**blank** forms igneous rock , flows out in rivers of lava when it reaches the surface

magma

Certain air pollutants form **blank** liquid when dissolved in water droplets in the air

acid

the most abundant in the universe is **blank**

hydrogen

Spongy bone is found inside bones and is lighter and less dense than compact bone because it is **blank**

porous

Animals are heterotrophs , which means that they can not make their own **blank**

food

the electron domain geometry of ammonia is **blank**

tetrahedral

In humans , fertilization occurs soon after the oocyte leaves **blank**

ovary

Oxygen , carbon dioxide , atp , and nadph are reactants in **blank** process that plants use to produce food

photosynthesis

the basic unit of the structure and function of living things is **blank**

cell

When a nerve impulse reaches the end of an axon , **blank** are the chemicals released by the axon called

neurotransmitters

ecosystems absorb **blank** on the earth

energy

populations can grow under **blank** exponentially

ideal

Malonate plays **blank** negative role on the enzyme succinate dehydrogenase

inhibitor

**blank** mass extinctions have occurred throughout earth 's history

five

**blank** refers to the ability to change or move matter and is required by all life processes and living things

energy

we call the visible part of the electromagnetic spectrum **blank**

light

**blank** of crust is made of basalt lavas that flow onto the seafloor

oceanic

a large molecule with many repeating units is **blank**

polymer

Small nonprotein , water-soluble molecules or ions called second messengers often play a role in **blank** kind of pathways

signaling

many mammals control their body temperature by **blank**

sweating

The invention of the wheel is an example of **blank** , which has the goal of solving human problems

technology

a partial body cavity is filled **blank** in roundworms with fluid

pseudocoelom

Most of the energy used by living things comes either directly or indirectly from **blank**

sun

When present in large volumes , **blank** color hue can water emit

blue

**blank** prevents new ovarian follicles from developing and suppresses uterine contractility

progesterone

The majority of elements , including iron and copper , are of **blank** type

metals

The bilaterians are divided into deuterostomes and **blank**

protostomes

it is called **blank** when birds keep their eggs warm while the embryos inside develop

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

slump

the organ system that brings oxygen into the body and releases carbon dioxide is **blank**

lungs

the union of the cytoplasms of two parent mycelia is known as **blank**

plasmogamy

The ladybug and the frog both start as eggs and go through **blank** process

metamorphosis

In multicellular organisms , essential biological functions are carried out by **blank**

organs

Fahrenheit , celsius , and kelvin are all units which measure **blank**

temperature

the smallest particles of matter are **blank**

atoms

Hydrophilic molecules generally avoid **blank** other kinds of molecules

hydrophobic

**blank** describes reproducing by external fertilization after the female sheds large numbers of small eggs

oviparous

While ecosystems need a constant input of energy for their organisms , **blank** do ecosystems recycle

matter

the term for something is changing from water to ice is **blank**

freezing

an individual with more than the correct number of chromosome sets is called **blank**

polyploid

Most of the fresh water on earth is tied up in a solid form . **blank** are they called

glaciers

Hertz proved that **blank** type of waves travel at the speed of light

electromagnetic

**blank** in removing phosphorylated amino acids from proteins

phosphatase

Electricity consists of a constant stream of **blank** tiny particles

electrons

a solution with a ph is lower than 7 called **blank**

acid

**blank** interprets signals , while the motor division sends signals

sensory

the process of filtering waste from the kidneys is **blank**

dialysis

The four basic types of tissue are epithelial , muscle , connective , and **blank**

nervous

Carnivores that eat herbivores are **blank** kind of consumers

secondary

In the case of the moose , predation is an additional factor that regulates **blank**

population

Changes from a less-ordered state to a more-ordered state ( such as a liquid to a solid ) are always **blank**

exothermic

When a meteoroid reaches earth , **blank** is the remaining object called

meteorite

Alpha emission is a type of **blank**

radioactivity

the stored food in a seed called is **blank**

endosperm

Boron only occurs naturally in compounds with **blank** element

oxygen

**blank** link exchange surfaces with cells throughout the body

circulatory

Most of the chemical reactions in the body are facilitated by **blank**

enzymes

the termination of a pregnancy in progress is called **blank**

abortion

Testing **blank** usually requires making observations or performing experiments

hypothesis

Water molecules move about continuously due to **blank** type of energy

kinetic

**blank** is defined as a change in the inherited traits of organisms over time

evolution

angiosperms produce seeds in flowers **blank**

ovaries

All living things need air and **blank** to survive

water

The cells of all eukarya have a **blank**

nucleus

**blank** of plate boundaries produce huge mountain ranges in the ocean basin

divergent

Interstitial carbides are produced by the reaction of most transition metals at high temperatures with **blank** element

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

decomposers

the sites of protein synthesis or assembly are **blank**

ribosomes

primarily the result of plate tectonic motions is **blank**

earthquake

a group of neuron cell bodies in the periphery is called **blank**

ganglion

most of our food come from **blank**

angiosperms

Gases are most ideal at high temperature and **blank** pressure

low

**blank** serve as catalysts in most of the biochemical reactions that take place in organisms

enzymes

A pulley changes the direction of the force t exerted by the cord without changing its **blank**

magnitude

In the absence of air resistance , all falling objects accelerate at the same rate due to **blank** force

gravity

In the presence of oxygen , hydrogen can interact to make **blank**

water

The angle at which light bends when it enters a different medium is known as **blank**

refraction

the energy is emitted **blank** by the sun

electromagnetic