Classification and biodiversity and stem cell + genetic Flashcards
Classification Definition
putting organisms into groups in a logical way. This helps us to understand the variety of living things, and how they relate to each other.
The 5 kingdoms when classifying
plants, animals, bacteria, single celled organisms and fungi.
Plant Major Groups
Flowering
Non flowering
Animal major groups
Vertebrates - backbone
Invertebrates - no backbone
Binomial system order
Kingdom
Phylum
Class
Order
Family
Genus
Species
Morphological
Adaptations caused by size shape colour etc
Competition
Animals fight for resources when they are limited
Resources animals may compete for
Territory
Food
Mates
Resources plants may compete for
Light
Water
Minerals
Space
Intraspecific competition
within species
interspecific competition
Between species e.g. an oak and birch tree competing for sun
Biodiversity
the variety of different species and numbers of individuals within those species in an area.
Invasive species criteria
they have no predators in the area and the population grows out of control
they compete with native species and cause that species to die out in the area
they prey on native species, reducing their population
they carry a disease that existing native species are not immune to.
Advantages of Biological Control
The biological control agent is usually specific to a particular pest.
Doesn’t need re-introducing
Disadvantages of Biological Control
The biological control agent can introduce new diseases.
There is a delay between introducing the predator and a reduction in the pest.
gene
a section of DNA
Chromosone
a linear arrangement of genes
number of Chromosomes in a human cell
46
Genes effect …
attributes within the body
Mitosis
A cell divides into two genetically identical clones of itself
Meiosis
all the chromosomes are copied and the cell divides twice to make two gametes with 23 chromosomes
STEM Cell
an undifferentiated cell that can develop into a specialised cell. Specialised cells include nerve, bone, and muscle cells.
