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| Organisms that take nitrogen from the air and fix it in compound plants |
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| An organism that causes disease in another organism |
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| The most common sexually transmitted diesease in the US. |
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| Provides a large surface area for gas exchange |
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| a gene whose effect remains hidden when it is paired with a different gene |
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| different genes that affect the same single trait |
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| genetic makeup of an individual for a trait being studied |
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| determines human blood type |
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| makes up genes in chromosomes of living cells |
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| Coded material that migrates from a cell nucleus to a ribosome where a particular polypeptide will be synthesized |
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| Mutation that has the least chance to survive in a population's gene pool |
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| Major evidence that changes have occured in species |
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| single most valuable characteristic used to classify organsim |
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| animal with a head, thorax, abdomen, wings, an exoskeleton. |
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| largest group of living species of animals |
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| major limiting factor for land plant |
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| major limiting factors for aquatic plants |
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| characteristic used to classify plants in broad groupings |
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| part of flower that produces pollen |
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| cheif supporting cells of a stem of a woddy plant |
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| graph summarzing monthly temperature and precipitation |
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| ________ are important becuase they play an important role in all food webs |
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| Environmental trees or substances, deficiences in the diet, and inherited disorders are all causes of ________ diseases. |
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| In a closed circulatory system blood flows from the arteries into the ________. |
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| ________ in veins prevents the reversal of blood |
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| atria pumps blood into the |
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| most white blood cells destroy ________ |
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| in humans air is drawn into and pumped out of the lungs by movements of the ________ and the ________. |
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| hybrid means the same as ________ |
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| people with ________ have 3, 21 chromosomes |
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| credit for the theroy of ________ is usually given to Darwin and Wallace |
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| Mutations, crossing over, and segregation, and random recombinations are all sources of ________. |
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| the presence or absence of ________ separates prokaryoes from eukaryotes. |
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producers , consumers, parisites, predators, and decomposers are included among the organisms within the ________ kingdom |
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________ are a group of vertebrates that is found in the greatest variety of habitats. |
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| All birds, mammals, reptiles, amphibians, and bony fishes all have ________. |
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| All green land plants can be divided into ________ and ________. |
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| vascular and non-vascular |
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| ________ play a part in the reproduction of flowering plants by pollinating flowers. |
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| Photosynthesis occurs in the ________ of the plants leaves. |
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| Most prokaryotes are benefitial |
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| The nitrogen cycle is vital because animals and most green plants cannot use gaseous nitrogen |
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| Pathogens are transmitted from host to host exclusively by water and direct contact. |
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| A refrigerator promotes food spoilage by increasing bacterial reproduction. |
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| Skin cancer or an infection is a very common reason for death for a person infected with AIDS. |
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| The left ventricle of the heart pumps blood to some extremites of the body. |
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| The lymph system's cells in the lymph nodes remove pathogens and foreign materials. |
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| Shivering, sweating, and dilation and constriction of blood vessels in the skin are not involved in human body temperature regulation. |
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| Probability in genetics deals mainly with finding predicted outocomes of events. |
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| Darwin alone discovered the process of natural selection by the environment |
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| If the alleles of a gene are equally adaptive, their frequencies in the same gene pool of a large population will probably remain the same |
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| Interbreeding within a population is a way that gene frequencies can change. |
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| The binomial system of classification is not advantageous because all languages do not use the same name |
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| Poa pratensis, Poa annua, and Poa atumnalis are all members of the same genus |
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| Eukaryotes have membrane enclosed nuclei, but prokaryotes do not. |
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| The oldest fossil known today is 3.5 billion years old |
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| If evolutionary throy that organisms arise from a common ancestor is correct, then the older sedimentary rocks should not have fewer types of fossils |
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| The first cells were probably not heterotrophs. |
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| Increases in size of an animal means there is an increase in amount of cells. |
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| The gametophyte generation of a plant is haploid in all its cells |
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| Sepals, petals, stamens, and carpels are not the four prinicipal structural parts of most flowers. |
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| In a flower, pollination must occur before fertilization can occur. |
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| Sperm cannot reach the egg of a flowering plant through the pollen tube. |
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| Mosses can grow very tall even though they lack specialized vascular and support tissues |
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| Mosses are dependant upon moist environments. |
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| Thick water storing leaves, spine like leaves, and thick waxy cuticles are all leaf adaptations to dry habitats |
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| Two main functions of vascular tissue are conduction and support |
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