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7th Grade Review
Terms in this set (100)
A series of steps followed to solve problems including collecting data, formulating a hypothesis, testing the hypothesis, and stating conclusions.
The decimal measuring system based on the meter, liter, and gram as units of length, capacity, and weight or mass.
A logical interpretation based on prior knowledge and experience.
Conditions that stay the same in the experiment
the group that does not receive the experimental treatment.
The measurable effect, outcome, or response in which the research is interested.
variable that is manipulated or tested in an experiment
A testable prediction, often implied by a theory
The basic unit of structure and function in living things
Control center of the cell
strong, supporting layer around the cell membrane in plant cells
A cell structure that controls which substances can enter or leave the cell.
Green pigment in plants that absorbs light energy used to carry out photosynthesis
Powerhouse of the cell
A complex molecule containing the genetic information that makes up the chromosomes.
Movement of molecules from an area of higher concentration to an area of lower concentration.
process by which organisms maintain a relatively stable internal environment
A type of protein that speeds up a chemical reaction in a living thing
Consisting of many cells
A group of similar cells that perform the same function.
group of tissues that work together to perform closely related functions
group of organs that work together to perform a specific function
A tiny cell structure that carries out a specific function within the cell
part of eukaryotic cell division during which the cell nucleus divides
Plants use the sun's energy to convert water and carbon dioxide into sugars
the process by which cells use oxygen to produce energy from food
reasons for mitosis
growth, repair, asexual reproduction
one whose trait always shows up in the organism when the allele is present
An allele that is masked when a dominant allele is present
Passing of traits from parents to offspring
specific characteristic of an individual
a type of cell division that results four sex cells with half the number of chromosomes of the parent cell
A segment of DNA on a chromosome that codes for a specific trait
Punnett Square (picture)
the study of heredity
special cells that contain half the number of chromosomes as body cells (egg and sperm)
Fusion of an egg and sperm cell
Different forms of a gene
Any cells in the body other than reproductive cells
A pairs with
C pairs with
male sex chromosomes
female sex chromosomes
A change in a gene or chromosome.
A disease in which some body cells grow and divide uncontrollably, damaging the parts of the body around them.
The process of selecting a few organisms with desired traits to serve as parents of the next generation
A person who has one recessive allele for a trait, but does not have the trait.
The direct manipulation of genes for practical purposes.
the process of making a copy of DNA
An organism that is genetically identical to the organism from which it was produced
A change in an organism's surroundings that causes the organism to react
a reaction to a stimulus
a simple, automatic response to a sensory stimulus, such as the knee-jerk response
threadlike structures made of DNA molecules that contain the genes
Physical breakdown of large pieces of food into smaller pieces
breaking down food with enzymes
Brings oxygen into the body. Gets rid of carbon dioxide.
Transports oxygen, waste, nutrients, hormones, heat, etc... around the body
chemical messengers that are manufactured by the endocrine glands, travel through the bloodstream, and affect other tissues
Glands secrete hormones that regulate processes such as growth, reproduction, and nutrient use (metabolism) by body cells.
Protects and supports body organs and provides a framework the muscles use to support movement. Made up of bones and joints
the ability to move from place to place, movement
removes waste- main organs are the kidneys
the network of nerve cells and fibers that transmits nerve impulses between parts of the body.
system of organs involved in producing offspring
Male sex hormone
estrogen and progesterone
female sex hormones
Nonliving components of environment.
All the living organisms that inhabit an environment
group of individuals of the same species that live in the same area
All the different populations that live together in an area
A biological community of interacting organisms and their physical environment.
A group of ecosystems with similar climates and organisms
the variety of life in the world or in a particular habitat or ecosystem.
A trait that helps an organism survive and reproduce
A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits.
The gradual change in a species over time
Release of harmful materials into the environment
The loss of a natural habitat
A term that typically describes a species that no longer has any known living individuals.
the struggle between organisms to survive in a habitat with limited resources
An interaction in which one organism kills another for food.
one species (parasite) feeds on but does not always kill another species (host)
An organism that can make its own food.
A consumer that eats only plants.
An animal that eats both plants and animals
A consumer that eats only animals.
A carnivore that feeds on the bodies of dead organisms
An organism's particular role in an ecosystem, or how it makes its living.
A species that influences the survival of many other species in an ecosystem
The process of grouping things based on their similarities
transfer of pollen from the male reproductive structure to the female reproductive structure
THIS SET IS OFTEN IN FOLDERS WITH...
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