a sugar or starch, which living things use for energy
the changes that occur as a living thing grows
process by which living things break down food
any chemical found in foods that are needed by a living thing
tiny structures inside a cell
group of different tissues that work together
chemical used by living things to build and repair body parts and regulate body activities
process by which living things produce offspring
the basic unit of life
living thing that can carry out all the basic life activities
a quality that describes an object
captures light energy from the sun to make food
information and control center of a cell
stores substances such as food, water, and waste products
thin layer that surrounds and holds a cell together, decides what can enter or leave a cell
a major change in form that occurs as some animal develop into adults
one of the bones or blocks of cartilage that makes up the backbone
place where an organism lives
a rod-shaped structure that contains DNA and is found in the nucleus of a cell
an organism's surroundings
there are almost no animals left of the species
an ecosystem found over a large geogrgaphic area
an organism that feeds on other organisms
a thing that an organism uses to live
interactions amoung the populations of a community and non-living things in their enviornment
when all members of a species are dead
anything added to the environment that is harmful to living things
group of different populations that live in the same area
the study of the interactions among living things and the non-living things in their environment
a vertebrate that lives at first in the water then on land
an egg laying vertebrate that breathes with lungs
structure used by some animals to breathe in water
the process in whuch cells break down food to release energy
the male organ of reproduction of the flower
tiny grains containing sperm
female organ of reproduction in the flower
lower part of the pistle that contains the egg
a sweet liquid that many kinds of flowers produce
start to grow into a new plant
part of some one celled organisms that sticks out like a foot to move the cell along
in horticulture and biology, any organism whose genetic information is identical to that of a "mother organism" from which it was created
is a genetic disorder known to be an inherited disease of the secretory glands, including the glands that make mucus and sweat.
is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms and some viruses
The DNA segments that carries genetic information
If an organism inherits two alleles that are at odds with one another, and the phenotype of the organism is determined completely by one of the alleles, then that allele is said to be dominant
is a chromosomal disorder caused by the presence of all or part of an extra 21st chromosome..
a stage or degree in a succession of natural descent
is the passing of traits to offspring (from its parent or ancestors
the genetic characters transmitted from parent to offspring, taken collectively
are changes to the nucleotide sequence of the genetic material of an organism
child or animal in relation to its parent or parents
the plant or animal tissue rich in such molecules, considered as a food source supplying essential amino acids to the body
A gene that is phenotypically expressed in the homozygous state but has its expression masked in the presence of a dominant gene
the major subdivision of a genus or subgenus, regarded as the basic category of biological classification, composed of related individuals that resemble one another, are able to breed among themselves, but are not able to breed with members of another species
is a microscopic infectious agent that can reproduce only inside a host cell.
any of various proteins originating from living cells and capable of producing certain chemical changes in organic substances by catalytic action, as in digestion
a simple sugar, is a very important carbohydrate in biology. The living cell uses it as a source of energy
is a type of sugar which is less sweet than glucose. It is considered a nutritive sweetener because it has food energy
is a sugar that is found most notably in milk
a sterol that occurs in all animal tissues, esp. in the brain, spinal cord, and adipose tissue, functioning chiefly as a protective agent in the skin and myelin sheaths of nerve cells
the part of the central nervous system enclosed in the cranium of humans and other vertebrates, consisting of a soft, convoluted mass of gray and white matter
a specialized, impulse-conducting cell that is the functional unit of the nervous system, consisting of the cell body and its processes, the axon and dendrites
abnormal growth of a mass of cells in the body
disorderly growth of cells in body tissue
subtances that cause cancer
one of the system of branching vessels or tubes conveying blood from various parts of the body to the heart.
system of branching vessels or tubes conveying blood away from heart.
the oxygen-carrying pigment of red blood cells that gives them their red color and serves to convey oxygen to the tissues
the fluid that circulates in the principal vascular system of human beings and other vertebrates, in humans consisting of plasma in which the red blood cells, white blood cells, and platelets are suspended.
the liquid part of blood or lymph, as distinguished from the suspended elements
the usual method of cell division
the assignment of organisms to groups within a system of categories distinguished by structure, origin, etc
protein molecules produced by B cells as a primary immune defense
the combining of the constituent elements of separate material or abstract entities into a single or unified entity
a disordered or incorrectly functioning organ, part, structure, or system of the body resulting from the effect of genetic or developmental errors; an illness; sickness; ailment
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions above and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.