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IB Evolution & Classification Review

Teacher: Mrs. Snodgrass
Horizontales
Features such as the pentadactyl limb that result from common ancestors and divergent evolution.
a pattern of evolution where an ancestral species evolves into a number of distinct species due to exposure of different populations to different selection pressures.
Phylum of animals that includes clams, octopus and squids.
A cumulative change in the genetically controlled characteristics of a population
the formation of new species as a result of geographic, physiological, anatomical, or behavioural factors that prevent previously interbreeding populations from breeding with each other.
a diagram which shows groupings based on primitive and shared derived characteristics.
For the classification Homo sapiens, Homo is the ______.
the hypothesis that evolutionary development is marked by isolated episodes of rapid speciation between long periods of little or no change
Phylum of animal that has stinging tentacles and a mouth, but no anus
Phylum of animals that includes worms with bilateral symmetry, segmentation and a complete digestive tract.
Classes or organisms are subdivided into ___________.
Phylum of animals that contains flat, nonsegmented bodies.
Verticales
using the number of differences in DNA or amino acid sequences to deduce how long ago species split
one of the three major categories of life: archaea, bacteria, and eukarya
Phylum of animals with no body symmetry and no true tissues.
a group comprised of an ancestral species plus all of the species that have evolved from the organism
an organism or cell having more than twice the haploid number of chromosomes.
The eye of an octopus and the eye of a human are examples f this type of structure.
one of the prokaryotic domains of life, more diverse than archaeans
For the classification Homo sapiens, sapiens is the ______.
survival to reproductive age of the varieties that are best adapted to existing environmental conditions
a feature of an organism that favours its survival to reproductive age. Adaptations can be behavioural, physiological, or structural
Evolution where species from different lineages show similar characteristics because they are subject to similar selection pressures
one of the prokaryotic domains of life. They tend to live in extreme environments, they have RNA polymerases and ribosomes that are closer to eukaryotes
Phylum of animals that has an exoskeleton and jointed appendages
Orders of organisms are subdivided into _____________.
the science of classification