Biology - Final Review (50 Questions) Scientific Method Observations: New observations are made and past data are studied Hypothesis: A testable statement is formulated Experiment/Observations: The hypothesis is tested by experiment of further observations Conclusion: The results are analyzed. • If the hypothesis is support. Continue work (multiple experiences) • If the hypothesis is rejected. Start again (new hypothesis) Car Scenario: Observations: Vehicle won’t start Hypothesis:
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Evolutionary trees convey a lot of information about a group’s evolutionary history. Biologists are taking advantage of this by using a system of phylogenetic classification. In contrast to the traditional Linnaean system of classification‚ phylogenetic classification names only clades. For example‚ a strictly Linnaean system of classification might place the birds and non-Avian dinosaurs into two separate groups. However‚ the phylogeny of these organisms reveals that the bird lineage actually
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significant feature of their prokaryote ancestry‚ a rigid cell walls surrounding the plasma membrane. The cytoplasm contains specialized organelles‚ each of which is surrounded by a membrane. Plant cells differ from animal cells in that they lack centrioles and organelles for locomotion (cilia and flagella)‚ but they do have additional specialized organelles. Chloroplasts convert light to chemical energy‚ a single large vacuole acts as a water reservoir‚ and plasmodesmata allow cytoplasmic substances
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development Question 2 of 20 Which of the following is the correct order of complexity‚ going from least to most complex? Atom‚ molecule‚ cell‚ tissue‚ organelle‚ organ Atom‚ molecule‚ organelle‚ cell‚ tissue‚ organ Organ‚ tissue‚ cell‚ organelle‚ molecule‚ atom Molecule‚ atom‚ organ‚ tissue‚ cell‚ organelle Question 3 of 20 The _______ is the highest level in life’s structural hierarchy. Ecosystem Population Organism Biosphere Question
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A mitochondrion (Terminologia histologica: Mitochondrion) is a cell organelle of eucaryotes with ovoid shape that is the major source for intracellular energy. Mitochondria are present in all but mature red blood cells. They can migrate through the cytoplasm and change their shape. These organelles have an outer unit membrane (membrana mitochondrialis externa) and an inner membrane (membrana mitochondrialis interna). The latter has protrusions into the matrix (mitochondrial plasma). Depending on
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Chapter 1 * animal Multicelled consumer with unwalled cells; develops through a series of stages and moves about during part or all of the life cycle. * archaean Member of a group of single-celled microorganisms that superficially resemble bacteria‚ but are genetically and structurally distinct. * atom Particle that is a fundamental building block of all matter. * bacterium Single-celled organism belonging to the Domain Bacteria; cells are typically walled and do not
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Week 2 Assignment Parts of the Living Cell The cell is the smallest living unit in the human body‚ and all cells need specific parts to function. Some of these cell parts are called organelles. The outer wall of an animal cell is called the cell membrane. It is called membrane because it allows certain materials to pass through in or out of the cell. Plant cells have cell walls‚ because it doesn’t allow materials to move in or out. Like any unit of life‚ cells also need energy. The mitochondria
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cells and all other cells are organelles. Organelles are tiny organs in the cell. The nucleus is a large‚ often spherical body and has many gates that are called nuclear pores. The nucleus serves‚ as the control center of the cell. Within the nucleus is the nucleolus‚ which has the distinct responsibility of manufacturing ribosomes. Ribosomes are small organelles made out of protein and RNA and they assemble amino acids into complex proteins. The mitochondrion is an organelle that produces energy for
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The cytoskeleton helps to maintain cell shape. But the primary importance of the cytoskeleton is in cell motility. The internal movement of cell organelles‚ as well as cell locomotion and muscle fiber contraction could not take place without the cytoskeleton. The cytoskeleton is one of a few biological areas with broad potential for drug discovery and development and has been scientifically validated in a wide variety of human diseases. The concept of the cytoskeleton was first introduced by
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The Mitochondria is an organelle found in each cell in your body. It controls the energy function of each cell and ultimately the energy function of your body. The mitochondria are a vital part of how your body works and functions. If the genes in your body mutate effecting the mitochondrial your body will work differently. I was in 7th grade‚ in the hospital sick again when I began to learn about what was causing my illness. Since then the mitochondria has interested me but when I was recently
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