WEEK 13 - 14 Flashcards
an ancient genus
Magnolia
oldest pollinator
wind
major pollinator of flowering plants
bees
a complex tongue that enables bees to obtain nectar from flowers
proboscis
some are so dependent upon one another that were one to disappear, the other would very likely either starve or remain sterile
dependent partnerships
these spots are found outside the flower
extrafloral nectaries
develop trichomes on the leaves
multiple defenses
in some Passiflora the stipules change to look like a butterfly
false larvae
visible clues can be almost as important as chemical clues
chameleon shapes
attracts animals that carry pollen
nectar
are a hollow, horn-like extension of a flower that holds nectar in its base
corolla spurs
group of unrelated plant species that benefit each other
plant guild
gene pool is conserved and utilized
genetic conservation
conservation od biological diversity outside of natural habitats
ex situ
conservation of ecosystems and habitats
in situ
diversity from different species present in an ecosystem
interspecific diversity
variation in the relative frequency of different genotypes in a small population
genetic drift
high levels of homozygosity and relatively little genetic variation within single populations
self-pollinating plants
inbreeding results reduced fitness and lower survival rates among offspring
outbreeding species
increased homozygosity for deleterious alleles
inbreeding depression
number of deleterious alleles present in the gene pool of a population
genetic load
main route for gene flow
migration
loss of previously existing genetic diversity from a population or species
genetic erosion
boosting the numbers of a declining population by transplanting and releasing individuals of the same species captures or collected from more numerous populations elsewhere
population augmentation
gene pool of the original population is overwhelmed by different genotypes from the transplanted individuals and loses its identity
genetic swamping
reduced fitness occurs in the progeny of matings between genetically diverse individuals
outbreeding depression
group of alleles that have evolved to work together to produce the best level of fitness in an individual
coadapted gene complexes
plays an important role in the survival and adaptability of a species
genetic diversity
changes in allele frequencies due to random chance
genetic drift
most genetic variation is caused by the accumulation of neutral mutations that got high frequencies through genetic drift
neutral theory of evolution
new mutations can spread throughout a population because of genetic drift
non-darwinian evolution
