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biology - Board of Studies
biology - Board of Studies

... In garden peas, the allele for purple flowers (P ) is dominant over the allele for white flowers ( p). The allele for smooth seeds (S ) is dominant over the allele for wrinkled seeds (s). A plant that is pure breeding for purple flowers and wrinkled seeds is crossed with a plant that is pure breedin ...
unit 3 – how do living
unit 3 – how do living

... nucleotides. They store and transmit genetic information (heredity), like, for example, the DNA. DNA is in the nuclei of all cells. ...
B - Uplift Education
B - Uplift Education

... A Volcanoes are most often located in the middle of tectonic plates B New volcanoes are located near inactive plate boundaries C Faults and volcanoes existed before there were any tectonic plates D Faults and volcanoes are often found at tectonic plate boundaries ...
2.1 Tectonic Forces
2.1 Tectonic Forces

... called fossils. Sedimentary rocks typically are formed in layers called strata. The layering of sedimentary rocks sometimes gives them the property of splitting along layer lines. The sand, silt and mud that become sedimentary rocks are made through the action of rivers whose movement keeps these pa ...
Presentation - Copernicus.org
Presentation - Copernicus.org

... carbonates, and enhanced biosphere mass as demonstrated by appearance of hydrocarbon deposits. • However, rapid enhanced of the bulk of biosphere did not accompanied by the same increasing of the biodiversity; new forms (especially multicellular organism) appeared in small quantity and long time did ...
Physical Earth Science Semester 1 Mid
Physical Earth Science Semester 1 Mid

... 24. Describe the law of conservation of mass. It states that mass cannot be created or destroyed 25. What is the largest expanse of time on the geologic time scale called? eon 26. What is an example of a geologic event that could be recorded in rocks? A volcanic eruption 27. What is the order of ele ...
Phylum: Chordata
Phylum: Chordata

... Found in extreme environments with no oxygen, such as the hot springs of Yellowstone National Park or deep ocean vents ...
marine invertebrates Powerpoint presentation
marine invertebrates Powerpoint presentation

... Molting of the cuticle is called ecdysis. Extensive cephalization. Open circulatory systems in which a heart pumps hemolymph through short arteries and into open spaces (sinuses). Aquatic members- gills for gas exchange; terrestrial members- tracheal system of branched tubes leading from surface thr ...
Answers to examination questions in Chapters 1
Answers to examination questions in Chapters 1

... the CO2 dissolved in water as HCO2; heterotrophic organisms feed on producers; thus releasing carbon dioxide by means of respiration; sediments at the ...
The Theory of Continental Drift
The Theory of Continental Drift

... the organism survive and are passed to the next generation (natural selection) *over time, the beneficial mutations accumulate & result in an entirely different organism (not just a variation of the original organism) ...
Fungi - My Haiku
Fungi - My Haiku

... deuteromycete affects toes- athlete’s foot the mycelium forms within the outer layers of the skin it also produces “ring worm” which is not a worm at all Candida albicans ; a yeast that can grow In moist areas of the body ...
Chapter 35 PowerPoint
Chapter 35 PowerPoint

... – First land vertebrates to kill beasts their own size ...
Earth Science Quiz-1 Please answer the following multiple choice
Earth Science Quiz-1 Please answer the following multiple choice

... a. A tentative explanation of a body of data is called a hypothesis b. A theory is less likely to be correct than hypotheses. c. A hypothesis is strengthened if it successfully predicts the outcomes of new experiments. d. If new evidence indicates that a theory is wrong, the theory may be modified d ...
Earth Science Quiz-1 Please answer the following multiple choice
Earth Science Quiz-1 Please answer the following multiple choice

... a. A tentative explanation of a body of data is called a hypothesis b. A theory is less likely to be correct than hypotheses. c. A hypothesis is strengthened if it successfully predicts the outcomes of new experiments. d. If new evidence indicates that a theory is wrong, the theory may be modified d ...
Chapter 3
Chapter 3

... Section 1 ...
2013-2014_PACING_GUIDE_EARTH_SCIENCE
2013-2014_PACING_GUIDE_EARTH_SCIENCE

... refinement and change with the addition of new scientific evidence. The nature of science includes the concept that science can provide explanations about nature, can predict potential consequences of actions, but cannot be used to answer all questions. ...
Caught in the web
Caught in the web

... other organisms for their food. Consumers feed on plants or other animals. The food is used as the material for growth and to release energy for living. The energy in foods is released in a process called respiration. Respiration takes place in every living cell. Plants also use respiration to relea ...
Chapter 7 Changes Over Time A Branching Tree
Chapter 7 Changes Over Time A Branching Tree

... Animals (including humans), plants, and other organisms tend to produce too many offspring, and there may not be enough food, water, or shelter to protect them all. ...
Biology pages:Layout 1
Biology pages:Layout 1

... allows oxygen, carbon dioxide, water, and other substances to enter and leave a cell; a chloroplast uses water, carbon dioxide, and the sun’s energy to make glucose; mitochondria use food and oxygen to release energy. 25. (a) The cell membrane is said to be selectively permeable because it determine ...
Ch. 34
Ch. 34

... Rows of slime glands along a hagfish’s body produce large amounts of slime, perhaps to repulse other scavengers or deter a potential predator. ...
Chapter 34 Outline
Chapter 34 Outline

... Rows of slime glands along a hagfish’s body produce large amounts of slime, perhaps to repulse other scavengers or deter a potential predator. ...
Class Notes
Class Notes

... Rows of slime glands along a hagfish’s body produce large amounts of slime, perhaps to repulse other scavengers or deter a potential predator. ...
The Precambrian: Hadean, Archean and Proterozoic
The Precambrian: Hadean, Archean and Proterozoic

... • Archean and Early Proterozoic cells were primitive (prokaryotic) unicellular organisms • Developed in oxygen-free environments • Advanced cells requiring free-oxygen do not appear in the record until 1.5by at the time oxygen levels had to be 1% of present levels • Appearance of simple multicellula ...
The Theory of Continental Drift
The Theory of Continental Drift

... • Convection currents are thought to be the driving mechanism of plate movements. • Convection: the transfer of thermal energy by the movement of heated matter. – Convection currents in the asthenosphere are set in motion by the transfer of energy b/w Earth’s hot interior and its cooler exterior. ...
Document
Document

... – Australia and South America have similar tropical plant fossils and reptiles. ...
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Evolutionary history of life



The evolutionary history of life on Earth traces the processes by which living and fossil organisms have evolved since life appeared on the planet, until the present day. Earth formed about 4.5 Ga (billion years ago) and life appeared on its surface within 1 billion years. The similarities between all present-day organisms indicate the presence of a common ancestor from which all known species have diverged through the process of evolution. More than 99 percent of all species, amounting to over five billion species, that ever lived on Earth are estimated to be extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described.
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