BIO 1070- Inquiry Case 1: UNIT 1
- Zebra mussels were native to the Caspian see and the Black sea
- They were most likely transported here by the ballasts tanks of liners
- The zebra mussel was first discovered in 1988 in lake St. Claire.
- Around the world there are over 850 different species of mussels.
- Within North America there are 300 known species
- There are 41 species of mussels in Ontario.
Life cycle of a mussel:
- Unionids perform obligate parasitism meaning that they release there
eggs on another species of fish.
- Males release their sperm through the exhalant siphon and the females
take in the sperm with their inhalant siphon.
- Fertilization is internal and the embryos developed inside sacs called
- The embryos then mature into Glochidia and must be attached to the
gills of a fish host to continue to grow.
- The mantle tissue of the mussel can be in the shaoe of a smaller fish,
this allows for the bigger fish to go up close and get bitten by the
- At this time the mussel releases its glochidia and they attach to the
gills of the host.
Levels of biological organization: High to low
- DomainKingdomPhylum ClassOrderFamilyGenusSpecies
- Domain refers to organisms with eukaryotic cells
- Kingdom refers to animals
- Phylum refers to vertebrates
- Class refers to mammals
- Order refers to Primates
- Family refers to Hominidae
- Genus refers to Homo
- Species refers to Humans Genotype- same set of genes
Phenotype- differing physical features
Phenotypic Plasticity- when the same set of genes can cause differing
physical features according to environmental conditions.
Abundance- number of individuals
Diversity- number of species
Disparity- how physically different two species are
Genetic Variation- difference among individuals within among a species
Tree Thinking: Sister Taxa- 2 relatives from one recent ancestor
The Root- Common ancestor shared by all species depicted
Branches- Connections between ancestors and descendants
Terminal Nodes (tips)- living species
Internal Species- extinct ancestors
A clade is a section of the tree that contains both of the sister taxa, if one
of the taxa was cut off it would not be a clade.
Natural selection: Non-random differences in survival and/or reproduction
among individual entities on the basis of differences in heritable
Adaptation: 1) a characteristic that enhances the survival and/or
reproduction of organisms that bear it, relative to alternative (esp