Biology Key Word Definitions (D)

?
What is a decomposer?
A microorganism that breaks down waste products and dead bodies.
1 of 24
What is deforestation?
Removal of forests by felling, burning, etc.
2 of 24
What does dehydrated mean?
Lacking in water.
3 of 24
What does denature mean?
To change the shape of an enzyme so that it can no longer speed up a reaction.
4 of 24
What is a dependent variable?
The variable for which the value is measured for each and every change in the independent variable.
5 of 24
What is depression?
A mental illness that involves feelings of great sadness that interfere with everyday life.
6 of 24
What is a detritus feeder?
Microorganism that breaks down waste products and dead bodies (decomposer).
7 of 24
What does deoxygenated mean?
Lacking in oxygen.
8 of 24
What is dialysis?
The process of cleansing the blood through a dialysis machine when the kidneys have failed.
9 of 24
What is a dialysis machine?
The machine used to remove urea and excess mineral ions from the blood when the kidneys fail.
10 of 24
What is a diaphragm?
A strong sheet of muscle that separates the thorax from the digestive organs, used to change the volume of the chest during ventilation of the lungs.
11 of 24
What is differentiate?
Specialised for a particular function.
12 of 24
What is diffusion?
The net movement of particles of a gas or a solute from an area of high concentration to an area of low concentration (along a concentration gradient).
13 of 24
What is digestion?
To break down into small molecules by the digestive enzymes.
14 of 24
What are digestive juices?
The mixture of enzymes and other chemicals produced by the digestive system.
15 of 24
What is the digestive system?
The organ system running from the mouth to the anus where food is digested.
16 of 24
What is distillation?
A process which separates the components of a mixture on the basis of their different boiling points.
17 of 24
What is a DNA fingerprint?
A pattern produced by analysing the DNA which can be used to identify an individual.
18 of 24
What does domed mean?
A curved, domed shape.
19 of 24
What is dominant?
The characteristic that will show up in the offspring even if only one of the alleles is inherited.
20 of 24
What is a donor?
The person who gives material from their body to another person who needs healthy tissues or organs, e.g. blood, kidneys. Donors may be alive or dead.
21 of 24
What is a double-blind trial?
A drug trial in which neither the patient nor the doctor knows if the patient is receiving the new drug or a placebo.
22 of 24
What is double circulation?
The separate circulation of the blood from the heart to the lungs and then back to the heart and on to the body.
23 of 24
What is a drug?
A chemical which causes changes in the body. Medical drugs cure disease or relieve symptoms. Recreational drugs alter the state of your mind and/or body.
24 of 24

Other cards in this set

Card 2

Front

What is deforestation?

Back

Removal of forests by felling, burning, etc.

Card 3

Front

What does dehydrated mean?

Back

Preview of the front of card 3

Card 4

Front

What does denature mean?

Back

Preview of the front of card 4

Card 5

Front

What is a dependent variable?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Biology Key Word Definitions (D) resources »