Classification

jigsaw puzzle (72 pieces) Domains for Life Watch the video. Select words to fill in the blanks. Habitat isolation occurs when two species cannot interbreed because they occupy different geographic areas. This can also be called geographic isolation.Temporal Isolation occurs when individuals of different species cannot interbreed because they breed at different times of the year.When different species cannot interbreed because they use different mating behaviors, behavioral isolation occurs.Males and females of some species have very specifically shaped genitalia. This prevents interbreeding of species and causes mechanical isolation.When a sperm is incapable of fertilizing the egg of a female from another species, gametic isolation occurs. jigsaw puzzle (91 pieces) Assemble the puzzle on prezygotic barriers. Select the answers to the blanks. If two different species do not mate with each other, they are reproductively isolated.Prezygotic barriers prevent the formation of fertilized eggs between two species.Post zygotic barriers influence the ability of hybrid individuals to survive and reproduce.Hydrids are formed when two different species mate.The most specific classification of organisms is species. jigsaw puzzle (35 pieces) Gradualism vs Punctuated Equilibrium Select the answers for the blanks. Much of the fossil record shows two patterns of speciation.Sometimes the fossil record shows long periods of equilibrium (little change) followed by an explosion of speciation or extinction. These are evidence of punctuated equilibrium.At other times in the fossil record shows slow, gradual change over long periods of time. This is called gradualism. Place the ideas under the correct heading. Gradualism Hypothesis that evolution proceeds by small, cumulative steps over long periods of time rather that by abrupt, major changes. Brings small variation to a particular species Occurs over a long period of time Describes evolution as a slow process. Punctuated Equilibrium Hypothesis that evolutionary development is marked by isolated episodes of rapid speciation between long periods of little or no change. Emphasizes consistent and cumulative changes to a species Evolution occurs within a short period of time. Short, dramatic events speed up evolution. Definitions of Species Match the species definitions. biological species concept Separating species by the ability to reproduce and produce fertile offspring morphological species concept Separating species by morphological characteristics, such as size and color phylogenetic species concept Using DNA sequences or amino acid sequences to separate species Classification Levels label the classification levels Domain Kingdom Phylum Class Order Family Genus species Select the correct answers for the blanks. Linnaeus created the rules for the binomial nomenclature system of naming organisms.In this system, the first name represents the genus, or the nearest group of related organisms.The first letter of the genus name is capitalized. jigsaw puzzle (54 pieces) The Three Domains of Life Select the answers that fill the blanks. Domains are the highest level of classification.Archaea are an ancient lineage of prokaryotes that separated from other forms of bacteria millions of years ago.Archaea are often extremophiles, meaning they are able to live in harsh environments, like hot springs.Most of the known prokaryotes today fall within the bacteria domain.All eukaryotes are included in the eukarya domain. Eukaryotes have cells with a membrane bound nucleus and organelles. jigsaw puzzle (48 pieces) Kingdoms of Life Matching. prokaryotic no nuclear membrane, no organelles protists may have cilia, flagella, or amoeboid movement algae plant-like protists with cell walls and chlorophyll slime mold fungus-like protists fungi cell walls made of chitin, usually non-motile, heterotrophic and obtain their nutrients by absorption saprophytes live on dead or decaying matter parasites directly feed on living organisms symbionts live in close relationship with another spores single-celled reproductive structures Select the terms that fill the blanks. Plants have organs, which are groups of tissues that act together to serve a specific function.Heterotrophic organisms consume other organisms to obtain energy.Autotrophic organisms make their own food.Animals have complex organ systems such as respiration for gas exchange, digestion for breaking down complex macromolecules, circulation for distribution of nutrients and gases, and a nervous system for sensing and responding to the environment. Matching sessile permanently attached to a surface asymmetry no distinct body pattern filter feeder strains food from water bilateral symmetry can be divided into two equal halves radial symmetry appendages originate from a central point sexual dimorphism males and females of a species are different Fill in the blanks Porifera are the most primitive animals, having specialized cells but no tissues or organs.Sponges are in the Porifera phylum.Platyhelminthes, are also known as flatworms, and have a long, flattened body. They may be free-living or parasitic.Cnideria have a single body opening surrounded by stinging tentacles. They have tissues and a simple nervous system. They may be free-living or sessile. Fill in the blanks. Nematodes, also known as roundworms, are the most numerous phylum of animals.About 80% of all animals on Earth are nematodes, and they are found in every part of the biosphere.Nematodes have bilateral symmetry and a complete digestive system with a mouth and anus.Nematodes have sexual dimorphism, meaning there is a physically different male and female. Fill in the blanks. Annelida are long, segmented worms that are free-living in the water or land.Leeches are a type of Annelida.Arthropods have segmented bilateral bodies with jointed appendages.Arthropods have sturdy exoskeleton made of the polysaccharide chitin with jointed appendages projecting from the central body.Insects are Arthropods. Fill in the blanks. The mollusca phylum contains soft-bodied species with radial symmetry that may be aquatic or land-dwelling.Mollusca have a complete nervous, circulatory, respiratory, digestive, and reproductive (sexual) organ systems.All mollusks have a mantle, a fleshy fold that covers and protects the inner organs of the organism.The mantle of many mollusks secretes calcium carbonate which is used to produce a hard shell. Fill in the blanks. Echinodermata is a phylum of exclusively marine organisms.Symmetry varies; adults are radial while juveniles are bilateral.Adults are covered with spines.Complete nervous, digestive, and reproductive (sexual) organ systems.Starfish are echinoderms. Fill in the blanks. All members of the chordata phylum have a hollow, tubular nerve cord that travels down their back side.Gill slits are present in the area of the pharynx (throat) during the embryonic stage.Higher evolved members of chordata have a bony vertebral column that encases the nerve cord.