Flashcards in Key Things Deck (48):
What is a journal?
A scientific magazine in which scientists publish their findings.
What is a scientific paper
An article written by scientists.
What is a species?
A group of organisms that can reproduce with each other to produce offspring that will also be able to reproduce.
What is variation?
The difference between things.
What is a characteristic?
A feature of an organism.
What is classification?
Sorting things into groups.
What is continuos?
Continuos data can take any value between two limits. E.g. Length, mass, time.
What is continuos variation?
When the value of a variable is continuous, it shows 'continuous variation'.
What is discontinuous?
Data values that can only have one of a set number of options are discontinuous. E.g. Shoe sizes and blood groups.
What is discontinuous variation?
When the value of a variable is discontinuous, it shows 'discontinuous variation'.
What is an environment?
The conditions in a habitat caused by a physical factors and living organisms.
What is an Environmental factor?
Anything that can change the conditions in a habitat of the organisms that live there.
What is an environmental variation?
Differences between organisms caused by environmental factors.
What is an physical environmental factor?
A non-living factor that can change the conditions in a habitat. E.g. Amount of light, rainfall.
What is a resource?
Something needed by an organism. E.g. Plants need light as a resource.
What is Fertilisation?
Fusing of a male gamete with a female gamete.
What is a fuse?
When two things join together to become one
What is a gamete?
A cell used for sexual reproduction.
What is genetic information?
The inherited instructions that control your characteristics.
What is the definition of inherit?
A feature that an organism gets from a parent is inherited.
What is inherited variation?
Differences between organisms that are passed on to offspring by their parents in reproduction.
What is normal distribution?
If the value of a variable changes in a continuos way, it will often show a normal distribution. This means that the middle values of the data range are most common and values at the highest and lowest extremes are least common (forms a bell shape on charts).
What is a nucleus?
The 'control centre' of a cell, where genetic information is found.
What is an offspring?
The new organisms produced by reproduction.
What is a parent?
An organism that has produced offspring.
What is sexual reproduction?
Reproduction that needs two individuals to produce a new organism of the same type.
What is a zygote?
Another term for 'fertilised egg cell'.
What is correlation?
A relationship between two variables. If an increase in one variable appears to cause an increase in the other it is a 'positive' correlation. An increase in one linked with a decrease in the other it is a 'negative' correlation.
What is the definition of estimate?
An approximate answer, often calculated from a sample or using rounded values.
What is the definition of probability?
The likelihood of something happening.
What is a sample?
To take a small part of something to investigate. You use a sample to draw conclusions about what the larger whole is like.
What is cell division?
The splitting of a parent cell to form two identical daughter cells. The daughter cells both contain the same genetic information as the parent cell.
What is a chromosome?
A structure found in the nuclei of cells. Each chromosome contains one enormously long DNA molecule.
What is DNA?
A substance that contains genetic information, short for deoxyribonucleic acid.
What is a gene?
Section of the long strand of DNA found in a chromosome, which contains instructions for a characteristic.
What is a sex chromosome?
Chromosome that determines the sex of an organism in humans, makes have one X sex chromosome and one Y chromosome, while females have two Xs.
What is the definition of adapted?
If something has adaptations for a certain job or for survival in a particular place it is said to be adapted to that job or place.
What is biodiversity?
The range of different species of organism in an area.
What is the definition of competition?
There is competition between organisms that need the same resources as each other. We say that we compete for those resources.
What is an ecosystem?
All the physical environmental factors and all the organisms that are found in a habitat.
What is the definition of endangered?
When a type of organism is in danger of ceasing to exist.
What is the definition on extinct?
An organism that no longer exists.
What is a food web?
Many food chains linked together, showing the flow of energy through organisms in a habitat.
What is a gene bank?
Any facility that stores genetic material from different organisms. E.g. Seeds, gametes, tissue samples.
What is a native?
Naturally found in a certain area.
What is evolution?
A change in one or More characteristics of a population over a long period of time.
What is natural selection?
A process which an organism is more likely to survive and reproduce than other members of the species because it's possesses a certain inherited variation.