Plankton Pages - River-Lab
... at the base of aquatic food chains. They are a major source of food for freshwater animals. Blue-green bacteria produce oxygen as a by-product of photosynthesis. They are important oxygen producers. Most blue-green bacteria are single-celled but some form chains. Some have a gel-like substance surro ...
... at the base of aquatic food chains. They are a major source of food for freshwater animals. Blue-green bacteria produce oxygen as a by-product of photosynthesis. They are important oxygen producers. Most blue-green bacteria are single-celled but some form chains. Some have a gel-like substance surro ...
Plate Tectonics - MsPetersensScienceScholars
... Each plate has a name. They have drifted around the Earth’s crust, but if you put them together, they would fit like puzzle pieces. ...
... Each plate has a name. They have drifted around the Earth’s crust, but if you put them together, they would fit like puzzle pieces. ...
Human versus Amoeba - Valhalla High School
... For humans, transport is achieved through the use of blood contained in the thousands of miles of blood vessels that make up the circulatory system. All of this is put into motion by the constant beating of a muscular heart. Amoeba transport their nutrients through their cytoplasm by simple diffusio ...
... For humans, transport is achieved through the use of blood contained in the thousands of miles of blood vessels that make up the circulatory system. All of this is put into motion by the constant beating of a muscular heart. Amoeba transport their nutrients through their cytoplasm by simple diffusio ...
video slide
... This is the biggest phylum in existence. All these animals have a hard external skeleton and jointed legs. (‘Arthropod’ means jointed foot or limb). For many years these were treated as one huge phylum with three clear subphyla. More recently various lines of work, notably DNA analyses, suggest that ...
... This is the biggest phylum in existence. All these animals have a hard external skeleton and jointed legs. (‘Arthropod’ means jointed foot or limb). For many years these were treated as one huge phylum with three clear subphyla. More recently various lines of work, notably DNA analyses, suggest that ...
Plate Tectonic Theory
... •Alfred Wegener in the early 1900’s proposed the hypothesis that continents were once joined together in a single large land mass he called Pangea (meaning “all land” in Greek). He proposed that Pangea had split apart and the continents had moved gradually to their present positions - a process that ...
... •Alfred Wegener in the early 1900’s proposed the hypothesis that continents were once joined together in a single large land mass he called Pangea (meaning “all land” in Greek). He proposed that Pangea had split apart and the continents had moved gradually to their present positions - a process that ...
Earthworms and the Environment
... Earthworms improve the soil in the following ways: They eat their way through the soil They mix the ingested material helping to improve ...
... Earthworms improve the soil in the following ways: They eat their way through the soil They mix the ingested material helping to improve ...
Invertebrates
... 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 ...
... 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 ...
Phylogenetic Classification
... fossils. Fossil DNA and RNA generally are not sufficient in quantity or quality to be useful for such analyses. • Base sequence data may be influenced by horizontal gene transfer. This occurs when an organism passes DNA to an unrelated organism. First discovered in bacteria in 1959, it is now known ...
... fossils. Fossil DNA and RNA generally are not sufficient in quantity or quality to be useful for such analyses. • Base sequence data may be influenced by horizontal gene transfer. This occurs when an organism passes DNA to an unrelated organism. First discovered in bacteria in 1959, it is now known ...
Chapter 1
... scientists have discovered that man’s best friend can also use its nose to detect cancer. Cancer is a disease in which cells (the body’s most basic unit of life) multiply without stopping. For a long time scientists suspected that these cells give off a unique smell. To find out for sure, they put s ...
... scientists have discovered that man’s best friend can also use its nose to detect cancer. Cancer is a disease in which cells (the body’s most basic unit of life) multiply without stopping. For a long time scientists suspected that these cells give off a unique smell. To find out for sure, they put s ...
Natural Selection Brain Teaser Questions
... harbor in the warm waters of the Caribbean. Worms that had lived on the ship bottom crawled off in the warm waters and attempted to attach to other ships in this tropical area where there were no similar worms. Some of the worms were able to survive and reproduce. What would you expect to happen to ...
... harbor in the warm waters of the Caribbean. Worms that had lived on the ship bottom crawled off in the warm waters and attempted to attach to other ships in this tropical area where there were no similar worms. Some of the worms were able to survive and reproduce. What would you expect to happen to ...
Unit 1: Evolution Study Guide Big Idea 1: The process of evolution
... 5. Using the techniques of molecular biology, what are the two ways of measuring genetic variation in a population? 6. Geographic variation may be shown in a graded manner along a geographic axis known as a cline. What external factors might produce a cline? Why does the existence of a cline suggest ...
... 5. Using the techniques of molecular biology, what are the two ways of measuring genetic variation in a population? 6. Geographic variation may be shown in a graded manner along a geographic axis known as a cline. What external factors might produce a cline? Why does the existence of a cline suggest ...
modularity and mereology - Birkbeck, University of London
... Willi Hennig’s method is based on Darwin’s theory of descent with modification: ‘Evolution is a transformation of organisms in form and mode of life through which the descendants become different from their ancestors’ (Zimmerman, quoted in Hennig, 1966: 88). Limbs are transformed fins; fins are prim ...
... Willi Hennig’s method is based on Darwin’s theory of descent with modification: ‘Evolution is a transformation of organisms in form and mode of life through which the descendants become different from their ancestors’ (Zimmerman, quoted in Hennig, 1966: 88). Limbs are transformed fins; fins are prim ...
Geological time scale is hierarchical
... • several glacial-interglacial cycles with advance and retreat of continental glaciers – often 2 to 3 km thick – Massive enough to deform underlying crust – at maximum covered up to 1/3 of earth’s surface – unglaciated regions had very different climates ...
... • several glacial-interglacial cycles with advance and retreat of continental glaciers – often 2 to 3 km thick – Massive enough to deform underlying crust – at maximum covered up to 1/3 of earth’s surface – unglaciated regions had very different climates ...
EARTH AND SPACE SCIENCE
... • Predators such as bear, dog, and cat families evolved into modern form. • Large herbivores, such as the giant ground sloth flourished during this time. • Giant ice sheets began to spread near the end of the Pliocene Epoch – a drop in sea level occurred as a consequence of water being trapped in ic ...
... • Predators such as bear, dog, and cat families evolved into modern form. • Large herbivores, such as the giant ground sloth flourished during this time. • Giant ice sheets began to spread near the end of the Pliocene Epoch – a drop in sea level occurred as a consequence of water being trapped in ic ...
Layers of the Ocean - hrsbstaff.ednet.ns.ca
... 46. In a marine biome, organisms experience radical changes in their environment each day in which zone? Intertidal zone 47. In a lake containing sunfish, northern pike, water bugs, algae, and minnows, what organism would be present in the smallest numbers? Northern pike (top of this food chain) -> ...
... 46. In a marine biome, organisms experience radical changes in their environment each day in which zone? Intertidal zone 47. In a lake containing sunfish, northern pike, water bugs, algae, and minnows, what organism would be present in the smallest numbers? Northern pike (top of this food chain) -> ...
Animal Basics, Vertebrates, and Invertebrates
... • Eukaryotic cells with no cell wall or chloroplasts • Heterotrophs by ingestion (digest food inside their bodies) • Bodies are made of diploid cells (gametes are the only haploid cells) • Glucose stored as glycogen (a polysaccharide only found in animals) • Most are mobile at some point in their li ...
... • Eukaryotic cells with no cell wall or chloroplasts • Heterotrophs by ingestion (digest food inside their bodies) • Bodies are made of diploid cells (gametes are the only haploid cells) • Glucose stored as glycogen (a polysaccharide only found in animals) • Most are mobile at some point in their li ...
Bal Bharati Public School Class – 7 Subject
... Wind is an active agent of erosion and deposition in the deserts. Important landforms caused by wind are—mushroom rocks, sand dunes and loess. Mushroom rocks- winds erode the lower section more than the upper part. After a period of time, such rocks have narrower base, and wider top representing a m ...
... Wind is an active agent of erosion and deposition in the deserts. Important landforms caused by wind are—mushroom rocks, sand dunes and loess. Mushroom rocks- winds erode the lower section more than the upper part. After a period of time, such rocks have narrower base, and wider top representing a m ...
The Platyhelminthes are flatworms that lack a coelom
... concentration of nerves at the anterior end of the worm, where there may also be a concentration of photosensory and chemosensory cells. There is neither a circulatory nor respiratory system, with gas and nutrient exchange dependent on diffusion and cellcell junctions. This necessarily limits the t ...
... concentration of nerves at the anterior end of the worm, where there may also be a concentration of photosensory and chemosensory cells. There is neither a circulatory nor respiratory system, with gas and nutrient exchange dependent on diffusion and cellcell junctions. This necessarily limits the t ...
Construction of Earth
... sporadically or so slowly (over hundreds of millions of years) that we cannot observe them but only infer that they take place from other kinds of evidence 12.11.86 Identify the various features of the ocean floor which furnish evidence for plate tectonics: magnetic patterns, age, and topographical ...
... sporadically or so slowly (over hundreds of millions of years) that we cannot observe them but only infer that they take place from other kinds of evidence 12.11.86 Identify the various features of the ocean floor which furnish evidence for plate tectonics: magnetic patterns, age, and topographical ...
Chapter 3
... • Matter can be transformed, but cannot be created or destroyed. • Nutrients, matter that organisms require for life process, circulate throughout the environment in biogeochemical cycles. ...
... • Matter can be transformed, but cannot be created or destroyed. • Nutrients, matter that organisms require for life process, circulate throughout the environment in biogeochemical cycles. ...
CELLS AND HEREDITY
... DIFFUSION is the process by which molecules of a substance move from area of higher concentration to areas of lower concentration. Think of a drop of food coloring in a beaker of water. The drop is initially very concentrated. Gradually the color molecules move throughout the whole beaker of water u ...
... DIFFUSION is the process by which molecules of a substance move from area of higher concentration to areas of lower concentration. Think of a drop of food coloring in a beaker of water. The drop is initially very concentrated. Gradually the color molecules move throughout the whole beaker of water u ...
Slide 1
... In this Lesson you will learn some techniques and skills that will help you to pass my class. Some of the techniques will work for you and some may not. Each of you is unique. Different techniques work better with different personalities. You must determine which techniques work best for you. Howeve ...
... In this Lesson you will learn some techniques and skills that will help you to pass my class. Some of the techniques will work for you and some may not. Each of you is unique. Different techniques work better with different personalities. You must determine which techniques work best for you. Howeve ...
Document
... • Alfred Wegner proposed that all present-day continents originally form one land-mass- Pangaea • Wegner proposed that this supercontinent began to break up 200 million years ago ...
... • Alfred Wegner proposed that all present-day continents originally form one land-mass- Pangaea • Wegner proposed that this supercontinent began to break up 200 million years ago ...
Phylum Enchinodermata: The Starfish
... • Includes starfish, sea urchins, sand dollars, and others. • Name means “spiny skin” • Important to marine ecosystems (only major phylum which includes NO species that live on land or in fresh water) ...
... • Includes starfish, sea urchins, sand dollars, and others. • Name means “spiny skin” • Important to marine ecosystems (only major phylum which includes NO species that live on land or in fresh water) ...
carbon
... (1) as organic molecules in living and dead organisms found in the biosphere; (2) as the gas carbon dioxide in the atmosphere; (3) as organic matter in soils; (4) in the lithosphere as fossil fuels and sedimentary rock deposits such as limestone, dolomite and chalk; and (5) in the oceans as dissolve ...
... (1) as organic molecules in living and dead organisms found in the biosphere; (2) as the gas carbon dioxide in the atmosphere; (3) as organic matter in soils; (4) in the lithosphere as fossil fuels and sedimentary rock deposits such as limestone, dolomite and chalk; and (5) in the oceans as dissolve ...
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.