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a broad, regional type of ecosystem characterized by distinctive climate and soil conditions and a distinctive kind of biological community adapted to those conditions.
tropical rain forest
type of forest near the equator that receives as much as 250 cm of rainfall yearly
a tropical or subtropical grassland containing scattered trees and drought-resistant undergrowth
a vast, level, treeless plain in the arctic regions. The ground beneath the surface of the tundras is frozen even in summer
land with steep sides that rises sharply (1,000 feet or more) from surrounding land; generally larger and more rugged than a hill
covers 70% of earth's surface; largest biome; temperatures vary from region to region;, of or relating to the sea
bacteria that live under extreme conditions such as: high temperature, high salt content, and low oxygen
single-celled or simple multicellular eukaryotic organisms that generally do not fit in any other kingdom
type of asexual reproduction in which an organism replicates its DNA and divides in half, producing two identical daughter cells
form of sexual reproduction in which paramecia and some prokaryotes exchange genetic information
asexual reproduction in which a part of the parent organism pinches off and forms a new organism
single-celled reproductive bodies highly resistant to cold and heat damage; capable of new organisms
process in sexual reproduction in which male and female reproductive cells join to form a new cell
a type of reproduction involving only one parent that produces genetically identical offspring by budding or by the division of a single cell or the entire organism into two or more parts
a group of interdependent organisms inhabiting the same region and interacting with each other
collection of all the organisms that live in a particular place, together with their nonliving environment
nonliving, physical features of the environment, including air, water, sunlight, soil, temperature, and climate
..., breeding technique that involves crossing dissimilar individuals to bring together the best traits of both organisms
..., a diagram that shows the occurrence of a genetic trait in several generations of a family
..., A type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together
..., Structures in different species that are similar because of common ancestry.
..., inherited characteristic that improves an organism's ability to survive and reproduce in a particular environment
..., process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest
..., Several species of finches evolved to have different beak shapes to occupy a specific niche on the Galapagos islands.
..., supposedly went from light colored to dark "proving" Darwin's natural selection; used as proof of evolution
..., system responsible for taking in oxygen and releasing carbon dioxide using the lungs
..., The human body system that contains the heart, blood, and all of the blood vessels. It delivers all the nutrients to the cells
skeletal muscular system
..., The bodily system that is composed of skeletal, smooth, and cardiac muscle tissue and functions in movement of the body or of materials through the body, and heat production.
..., the cells, tissues, and organs that protect the body from disease. the immune system is composed of the white blood cells, bone marrow, thymus gland, spleen and other parts
..., the body's speedy, electrochemical communication system, consisting of all the nerve cells of the peripheral and central nervous systems
..., organelle found in cells of plants and some other organisms that captures the energy from sunlight and converts it into chemical energy
..., process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches
..., the process by which cells break down simple food molecules to release the energy they contain
..., cell division in which the nucleus divides into nuclei containing the same number of chromosomes
..., network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem
..., a diagram that shows the amount of energy that moves from one feeding level to another in a food web
..., the falling to earth of any form of water (rain or snow or hail or sleet or mist)
..., a symbiotic relationship in which one member is benefited and the second is neither harmed nor benefited
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