biology Flashcards
what is the process of natural selection?
- variation
- environmental
- natural selection
- inheritance
- time
what are the charecteristics of the 3 domains of life?
archea- cells with no nucleus ,genes contain DNA and similar to eykarya
bacteria- cells with no nucleus
eukarya- cells with a nucleus
what is the difference between eukaryotes and prokaryotes?
prokaryotes do not have a nucleus and eukaryotes do have a nucleus
what does a ‘binomial’ name for a species mean?
a two-part name that consists of the genus and species of an organism
what is selective breeding?
repeatedly breeding organisms with desirable trates
what is genetic engineering?
changing of an organisms DNA or genome, by inserting genes from another creature
what evidence from stone tools may suggest evolution in the physical and mental capacities of human ancestors?
older stones have a more round shape whereas newer tools have a flatter sharper shape.
what traits might a breeder want to select for when breeding plants and animals?
strength, appearance, pest resistance
what is natural selection?
when different types of an organism adapt to a habitat better than others
what is golden rice?
contains vitamin A which can help prevent blindness in children
what information can scientists use to determine how closely related two species are?
can compare DNA sequences
what methods could be used to classify a newly discovered species?
a hierarchical system
