Diversity of Living Things Flashcards
What is the significance of a honeybee?
They are a keystone species. They WERE an invasive species. Honeybees play a large role in the food chain.
What is the genetic level of biodiversity?
The sum of all the different genes in a particular species. Species includes all individuals that can breed freely and produce fertile offspring. Low genetic diversity in a species leaves it susceptible to disease, changes in temp. predators and prey.
What is the species level of biodiversity?
Variety of species in an area. Ecosystems are healthier when they have a variety of species to survive environmental changes. Since ecosystems are about connections, the more species there are, the more complicated and robust the ecosystem is.
What is the ecosystem level of biodiversity?
The range of habits and organisms and the connections between them. Diverse ecosystems can be large or small, simple or complicated. “Walking Ecosystem” refers to the fact that many organisms live on or inside other organisms.
Why do we value biodiversity?
It creates healthier, more stable and resilient ecosystems. Keystone species are important symbols of biodiversity. They provide humans with medicine, food, fuel, oxygen, water and clean/safe conditions.
What do names have to do with species?
Names can reveal the evolutionary history of their species, ecological relationships with other species and distinguish characteristics of that species.
What is a Dichotomous key?
Series of questions to correctly identify a new or unknown species.
What is taxonomy?
The science of naming, identifying and classifying species. Identify organisms and represent relationships among them.
What is binomial nomenclature?
Method of naming organisms by using two name (genus and species). Devised by Carl Linnaeus in the 1750’s.
What is phylogeny?
The history of the evolution of a species of group of organisms.
What are the systems of classification?
Domain, kingdom, phylum, class, order, family, genus and species.
What are the 3 domains (the broadest taxa)?
Bacteria, Archaea and Eukarya.
Examples of bacteria?
Cyanobacteria and heterotrophic bacteria.
Examples of archaea?
Halophiles and thermophiles.
Examples of eukarya?
Plants, animals, fungi and flagellates.
What do bacteria and archaea have in common?
Microscopic, unicellular, have no nucleus or membrane-bound organelles (Prokaryotic organisms).
What info about eukarya?
Nucleus, membrane-bound organelles (Eukaryotic organisms).
Difference in genetic material between p and e?
Prokaryotes DNA is not coated with protein and often occurs in strands or floats freely in cytoplasm. Eukaryotes have a nucleus bound by a membrane contains chromosomes made of DNA and proteins.
Difference in cell division between p and e?
Prokaryotes: fission or budding. Eukaryotes: splits into 2 genetically identical cells.
Difference in sexual recombination between p and e?
Prokaryotes: transfer of genes from donor to recipient. Eukaryotes: often a male and female participate in fertilization.
Difference in tissue development between p and e?
Prokaryotes: none. Eukaryotes: sometimes.
Difference in respiration between p and e?
Prokaryotes: some require oxygen and some do not. Eukaryotes: almost all require oxygen.
Difference in size between p and e?
Prokaryotes: smaller
Eukaryotes: larger.
Difference in energy production between p and e?
Prokaryotes: free-floating enzymes in cytoplasm
Eukaryotes: enzymes for energy production are located in mitochondria or chloroplasts.