Ecological character displacement in the face of gene flow
... caused by interspecific competition. Such differentiation could facilitate speciation by enhancing reproductive isolation between incipient species, although empirical evidence for it at early stages of divergence when gene flow still occurs between the species is relatively scarce. Here we studied ...
... caused by interspecific competition. Such differentiation could facilitate speciation by enhancing reproductive isolation between incipient species, although empirical evidence for it at early stages of divergence when gene flow still occurs between the species is relatively scarce. Here we studied ...
Structure & Function I
... but varies between species; position, shape, number may be characteristic of taxon ...
... but varies between species; position, shape, number may be characteristic of taxon ...
Fish vs. Human Respiration
... over filaments. These filaments are attached to the gills and supplied with blood. The concentration of oxygen is higher in the water than in the blood so oxygen enters the blood and carbon dioxide leaves it. This is called external respiration. The newly oxygenated blood is carried throughout the f ...
... over filaments. These filaments are attached to the gills and supplied with blood. The concentration of oxygen is higher in the water than in the blood so oxygen enters the blood and carbon dioxide leaves it. This is called external respiration. The newly oxygenated blood is carried throughout the f ...
PhD in Molecular Medicine
... by an entire genome. The last decade has been called the “Decade of Genomics”, and the first decade of the new millennium has been named the “Decade of Proteomics”. The sequencing of entire genomes, including the human genome, is resulting in the identification of a huge number of novel proteins who ...
... by an entire genome. The last decade has been called the “Decade of Genomics”, and the first decade of the new millennium has been named the “Decade of Proteomics”. The sequencing of entire genomes, including the human genome, is resulting in the identification of a huge number of novel proteins who ...
Beak of Finches Questions
... Key Words: Beak, adaptation, environment, survival of fit, differential reproduction When Charles Darwin traveled to the Galapagos Islands, he observed 14 distinct varieties of finches on the islands. Darwin also observed that each finch variety ate a different type of food and lived in a slightly d ...
... Key Words: Beak, adaptation, environment, survival of fit, differential reproduction When Charles Darwin traveled to the Galapagos Islands, he observed 14 distinct varieties of finches on the islands. Darwin also observed that each finch variety ate a different type of food and lived in a slightly d ...
The Respiratory System
... with higher concentration of CO2 in the blood stream, the concentration gradient is directed outwards from the blood into air sac With inhalations oxygen passively diffuses from the air sac across the alveolar membrane. WIth higher concentration of oxygen in air sac, concentration gradient is direct ...
... with higher concentration of CO2 in the blood stream, the concentration gradient is directed outwards from the blood into air sac With inhalations oxygen passively diffuses from the air sac across the alveolar membrane. WIth higher concentration of oxygen in air sac, concentration gradient is direct ...
LEARNING OBJECTIVE 1: List the general functions of the
... Discuss factors, which affect breathing, including chemicals, lung tissue stretching, and emotional state. ...
... Discuss factors, which affect breathing, including chemicals, lung tissue stretching, and emotional state. ...
Review Set for Unit 1, Lesson 3 The Circulatory and
... • B. to break down the nutrients found in food so that they can be used by all cells in the body • C. to produce the chemical signals that allow parts of the body to communicate with other parts • D. to coordinate all other body systems so that they can function together to maintain homeostasis ...
... • B. to break down the nutrients found in food so that they can be used by all cells in the body • C. to produce the chemical signals that allow parts of the body to communicate with other parts • D. to coordinate all other body systems so that they can function together to maintain homeostasis ...
Document
... Peripherally, neuropeptide Y (NPY) is mainly known as a sympathetic vasoconstrictor cotransmitter, and centrally, as an appetite stimulant and mediator of obesity, particularly of the abdominal type. Recently, we found that NPY is also a potent angiogenic factor through activation of the Y2-receptor ...
... Peripherally, neuropeptide Y (NPY) is mainly known as a sympathetic vasoconstrictor cotransmitter, and centrally, as an appetite stimulant and mediator of obesity, particularly of the abdominal type. Recently, we found that NPY is also a potent angiogenic factor through activation of the Y2-receptor ...
Chapter 22
... • The air at the height of Mt. Everest is so low in oxygen that most people would pass out instantly if exposed to it • Geese that migrate over high mountains have adaptations for using and storing oxygen efficiently • Humans living at extremely high altitudes have adapted to function with relativel ...
... • The air at the height of Mt. Everest is so low in oxygen that most people would pass out instantly if exposed to it • Geese that migrate over high mountains have adaptations for using and storing oxygen efficiently • Humans living at extremely high altitudes have adapted to function with relativel ...
Respiratory Physiology
... Internal respiration : the exchange of gases between the tissue cells and the systemic capillaries. The diffusion of gases between the interstitial fluid and the cytoplasm. Gas transport in the blood : physical solvation and chemical ...
... Internal respiration : the exchange of gases between the tissue cells and the systemic capillaries. The diffusion of gases between the interstitial fluid and the cytoplasm. Gas transport in the blood : physical solvation and chemical ...
39 | the respiratory system
... Partial pressure is a measure of the concentration of the individual components in a mixture of gases. The total pressure exerted by the mixture is the sum of the partial pressures of the components in the mixture. The rate of diffusion of a gas is proportional to its partial pressure within the tot ...
... Partial pressure is a measure of the concentration of the individual components in a mixture of gases. The total pressure exerted by the mixture is the sum of the partial pressures of the components in the mixture. The rate of diffusion of a gas is proportional to its partial pressure within the tot ...
Mammalian monogamy is not controlled by a single gene
... avpr1a STRs has been reported to be associated with behavioral differences within particular populations of M. ochrogaster (15) and could thus be involved in the modulation of some social behaviors, the potential link of the presence of avpr1a STRs with monogamy is not as direct and general as previ ...
... avpr1a STRs has been reported to be associated with behavioral differences within particular populations of M. ochrogaster (15) and could thus be involved in the modulation of some social behaviors, the potential link of the presence of avpr1a STRs with monogamy is not as direct and general as previ ...
V. Control of Respiration
... defence system against inhaled matter. 2. Each alveolus is surrounded with a network of capillaries. 3. Gas diffusion occurs through the alveolar - capillary membrane of 0,2 – 0,6 m. 4. Total area of the alveolar walls in contact with capillaries, which is 70-100 square meters, can compensate for h ...
... defence system against inhaled matter. 2. Each alveolus is surrounded with a network of capillaries. 3. Gas diffusion occurs through the alveolar - capillary membrane of 0,2 – 0,6 m. 4. Total area of the alveolar walls in contact with capillaries, which is 70-100 square meters, can compensate for h ...
Keeping our muscles and our systems healthy you need to exercise
... scientific name for the heart is the cardiac muscle, or the myocardium and this muscle is different but special to other muscles. The heart has fibres and I have a pattern like a spiral instead of straight, so it is easier to pump and squeeze. Parts in the heart The heart is a pump made up with 4 ch ...
... scientific name for the heart is the cardiac muscle, or the myocardium and this muscle is different but special to other muscles. The heart has fibres and I have a pattern like a spiral instead of straight, so it is easier to pump and squeeze. Parts in the heart The heart is a pump made up with 4 ch ...
Sauropsids: Two Approaches to Terrestrial Life
... the lungs. As the vertebral column bends, volume of the cavity decreases; pressure in both lungs rises (shown by +), ing air out of the lungs (orrow). When the vertebral column straightens, volume of the thoracic cavity increases, pressure lungs falls (shown by -), and air is pulled into the lungs ...
... the lungs. As the vertebral column bends, volume of the cavity decreases; pressure in both lungs rises (shown by +), ing air out of the lungs (orrow). When the vertebral column straightens, volume of the thoracic cavity increases, pressure lungs falls (shown by -), and air is pulled into the lungs ...
Primary Function of the Lung
... it's the individual pressure exerted independently by a particular gas within a mixture of gasses. The air we breath is a mixture of gasses: primarily nitrogen, oxygen, & carbon dioxide. So, the air you blow into a balloon creates pressure that causes the balloon to expand (& this pressure is genera ...
... it's the individual pressure exerted independently by a particular gas within a mixture of gasses. The air we breath is a mixture of gasses: primarily nitrogen, oxygen, & carbon dioxide. So, the air you blow into a balloon creates pressure that causes the balloon to expand (& this pressure is genera ...
Written by Faith T
... movement of the body, however they are the hollow structures in the body. These need to move, for ...
... movement of the body, however they are the hollow structures in the body. These need to move, for ...
Fetal Pig Anatomy
... cellulose. One clade of ungulates, the "ruminants" (camels, giraffes, deer, sheep, cattle) use "foregut fermentation". Ruminants have a multi-chambered stomach in which cellulose breakdown takes place. This breakdown is aided by their ability to regurgitate the contents of their fermentation chamber ...
... cellulose. One clade of ungulates, the "ruminants" (camels, giraffes, deer, sheep, cattle) use "foregut fermentation". Ruminants have a multi-chambered stomach in which cellulose breakdown takes place. This breakdown is aided by their ability to regurgitate the contents of their fermentation chamber ...
Fetal Pig Anatomy Developed by Dr. Mark Stanback
... One clade of ungulates, the "ruminants" (camels, giraffes, deer, sheep, cattle) use "foregut fermentation". Ruminants have a multi-chambered stomach in which cellulose breakdown takes place. This breakdown is aided by their ability to regurgitate the contents of their fermentation chamber back into ...
... One clade of ungulates, the "ruminants" (camels, giraffes, deer, sheep, cattle) use "foregut fermentation". Ruminants have a multi-chambered stomach in which cellulose breakdown takes place. This breakdown is aided by their ability to regurgitate the contents of their fermentation chamber back into ...
Organisms at high altitude
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Organisms can live at high altitude, either on land, or while flying. Decreased oxygen availability and decreased temperature make life at high altitude challenging. Despite these environmental conditions, many species have been successfully adapted at high altitudes. Animals have developed physiological adaptations to enhance oxygen uptake and delivery to tissues which can be used to sustain metabolism. The strategies used by animals to adapt to high altitude depend on their morphology and phylogeny.