Living Environment Vocabulary - Extinction - Linear Sequence Pg C

occurs when the sperm fertilizes the egg cell within the female's body

substance secreted by the pancreas that maintains normal blood sugar levels

the complex, interconnecting food chains in a community

the male and female sex cells that combine to form a zygote during fertilization

heterotrophic organisms that obtain their energy by feeding on decaying organisms (ie. yeast)

a system that reverses an original response that was triggered by a stimulus

the complete disappearance of a species from Earth

the ability to resist or prevent infection by a particular microbe

in ecosystems, substances that are cycled between living things and the environment

the differences among offspring in their genetic make-up

classification that includes humans, human ancestors, and African great apes

the order of the (nucleotide) sub-units that make up each long strand of a DNA molecule

similar structures/charaterisitics that different organisms inherited from a common ancestor

a type of behavior in which an animal retreats to secluded place within its habitat to sleep

the triplet code, in which each different combination of three bases makes up a codon

the organisms that a parasite uses for food and shelter by living on it or near it

inherited behaviors (instincts) that do not change, even if repeated many times

cell structures that package and distribute many materials for the cell

in sexual reproduction, process by which an egg cell and a sperm cell unite to form a zygote

one of the six most important chemical elements for living things

a scale for looking at the structure of a system (atoms to cells to tissues to organs)

in an experiment, the difference that might explain an observation

occurs when the embryo develops within the female's body

animals that obtain their energy by eating plants

a developing embryo after the first three months of development

describes an organism that obtains its energy by feeding on other living things; consumers

the type of experiment in which two organisms with different traits are bred

in the body, the maintenance of a constant internal environment

different environment conditions can limit where an organism can live (such as water and sun)

a possible answer to a specific scientific question, tested by doing an experiment

the organ primarily responsible for regulating chemical composition of blood

chemical messengers that bind with receptor proteins to affect gene activity

the three-layered structure that a zygote becomes after the blastula phase

photograph of chromosomes in a human cell, paired up with & numbered from largest to smallest

recombinant DNA technology (insertion of genes from one organism into another)

an increase in the average atmospheric temperature of Earth due to more heat - trapping CO2

recognizes and attacks specific invaders to protect the body against infection and disease

describes the genetic information that is passed from parent to offspring

the traces or remains of a long-dead organism, preserved by natural processes

the use of genetic information in a gene to produce a particular trait

Earth's history divided into units of time by important changes in climate, surface, life form

the direct transfer of energy from one organism to the next

illnesses that occur when the body's immune system is underactive because it is weakened

the segment of DNA that contains the genetic information for a given trait or protein

a simple sugar that has six carbon atoms bonded together; a sub-unit of complex carbohydrates

the process by which traits are passed from one generation to the next

in cells, substances that allow chemical reactions to take place

the major grouping into which scientists categorize living things

the place in which an organism lives; a specific environment that has an interacting community