UNIT I
... Almost everything around us can be broken down into simpler substances. These substances can be further broken down into other simpler substances. There is a point where substances can no longer be broken down into other substances while keeping their characteristic properties. These substances are ...
... Almost everything around us can be broken down into simpler substances. These substances can be further broken down into other simpler substances. There is a point where substances can no longer be broken down into other substances while keeping their characteristic properties. These substances are ...
KCSE ONLINE REVISION BIOLOGY NOTES FORM 3 This
... mountains affect distribution of organisms which differ on lowlands and on highlands mountains also form physical barriers to migration of organism and may cause isolation of species background may offer camouflage to some organisms hence protection from enemies Rainfall (water) or precipitati ...
... mountains affect distribution of organisms which differ on lowlands and on highlands mountains also form physical barriers to migration of organism and may cause isolation of species background may offer camouflage to some organisms hence protection from enemies Rainfall (water) or precipitati ...
Chapter 1
... Anatomical position: Terms of relative position are used to describe the location of a part relative to another part. Superior: Needs to be in reference to another part. What does it mean? Inferior: Opposite of superior, what does it mean? Anterior: Means the same as ventral in humans. Where does it ...
... Anatomical position: Terms of relative position are used to describe the location of a part relative to another part. Superior: Needs to be in reference to another part. What does it mean? Inferior: Opposite of superior, what does it mean? Anterior: Means the same as ventral in humans. Where does it ...
Biology Form 3
... • mountains affect distribution of organisms which differ on lowlands and on highlands • mountains also form physical barriers to migration of organism and may cause isolation of species • background may offer camouflage to some organisms hence protection from enemies Rainfall (water) or precipitati ...
... • mountains affect distribution of organisms which differ on lowlands and on highlands • mountains also form physical barriers to migration of organism and may cause isolation of species • background may offer camouflage to some organisms hence protection from enemies Rainfall (water) or precipitati ...
Obj 2 & 3
... in the lava of volcanoes. Which statement best explains how bacteria could survive in this environment? ...
... in the lava of volcanoes. Which statement best explains how bacteria could survive in this environment? ...
For each of the statements below decide which two
... 14. Nutrients are absorbed by the intestines and distributed through the blood stream ____________________________ & _____________________________ systems Select the best answer to the following questions: 1. Which two systems below are responsible for protecting tender internal organs? A skeletal a ...
... 14. Nutrients are absorbed by the intestines and distributed through the blood stream ____________________________ & _____________________________ systems Select the best answer to the following questions: 1. Which two systems below are responsible for protecting tender internal organs? A skeletal a ...
MODEL QUESTION PAPER I CLASS XI BIOLOGY (THEORY) Max
... (a) Describe the fluid mosaic model of plasma membrane. (b) Describe the structure of plastids along with a diagram. Q27. How will you ascertain by looking at the external and the internal characters, whether a plant is C3 or C4? Even though very few cells in a C4-plant carry out biosynthetic Calvin ...
... (a) Describe the fluid mosaic model of plasma membrane. (b) Describe the structure of plastids along with a diagram. Q27. How will you ascertain by looking at the external and the internal characters, whether a plant is C3 or C4? Even though very few cells in a C4-plant carry out biosynthetic Calvin ...
VIII. INTERNAL ENVIRONMENT REGULATION, cont
... Limiting factors may be described as Density-Dependent Density-Independent ...
... Limiting factors may be described as Density-Dependent Density-Independent ...
respiratory bronchiole
... form within the lungs. The larger sizes have hyaline cartilage which decreases with smaller bronchi. Eventually the cartilage is replaced with smooth muscle. Bronchioles have diameters of less than 5 mm. Terminal bronchioles have intact but greatly reduced amounts of smooth muscle in the wall. When ...
... form within the lungs. The larger sizes have hyaline cartilage which decreases with smaller bronchi. Eventually the cartilage is replaced with smooth muscle. Bronchioles have diameters of less than 5 mm. Terminal bronchioles have intact but greatly reduced amounts of smooth muscle in the wall. When ...
Principles of Biomedical Science
... Explain how feedback systems are used by the human body to maintain homeostasis. Create a 3-D working model that demonstrates the role of insulin in transferring glucose from blood into cells. Explain the causes, symptoms, effects, and treatments of both Type I and Type II diabetes. Demonstrate an u ...
... Explain how feedback systems are used by the human body to maintain homeostasis. Create a 3-D working model that demonstrates the role of insulin in transferring glucose from blood into cells. Explain the causes, symptoms, effects, and treatments of both Type I and Type II diabetes. Demonstrate an u ...
Cells, diffusion and osmosis - Pearson-Global
... Our bodies are made up of millions of cells, of many different kinds. Yet each began as just a single cell. How do all these different cells arise? In a tiny embryo, each cell has the ability to divide and form new cells, and these new cells are able to turn into any of the different kinds of cells ...
... Our bodies are made up of millions of cells, of many different kinds. Yet each began as just a single cell. How do all these different cells arise? In a tiny embryo, each cell has the ability to divide and form new cells, and these new cells are able to turn into any of the different kinds of cells ...
The World of Biology - Northwest Creation Network
... gills, on the bottom that release the spores. However, puffball mushrooms have no gills but grow spores inside the ball. The puffball is the champion at releasing spores. Scientists estimate that a single puffball may contain a thousand million of the nearly invisible spores. Millions are released i ...
... gills, on the bottom that release the spores. However, puffball mushrooms have no gills but grow spores inside the ball. The puffball is the champion at releasing spores. Scientists estimate that a single puffball may contain a thousand million of the nearly invisible spores. Millions are released i ...
CHAPTER 40
... movement; and internal digestive organs can break down food gradually, controlling the release of stored energy. Because the immediate environment for the cells is the internal body fluid, the animal’s organ systems can control the composition of the solution bathing its cells. A complex body form i ...
... movement; and internal digestive organs can break down food gradually, controlling the release of stored energy. Because the immediate environment for the cells is the internal body fluid, the animal’s organ systems can control the composition of the solution bathing its cells. A complex body form i ...
FWISD Science: Biology
... data in their scientific investigations. To introduce ideas about how scientists conduct investigations, use the lesson in the Engage segment before or after students watch the Nova video. The lesson explores the four main classes of biomolecules—i.e., carbohydrates, lipids, proteins, and nucleic ac ...
... data in their scientific investigations. To introduce ideas about how scientists conduct investigations, use the lesson in the Engage segment before or after students watch the Nova video. The lesson explores the four main classes of biomolecules—i.e., carbohydrates, lipids, proteins, and nucleic ac ...
Free Radicals and other reactive species in Disease
... Free radicals and other reactive species are constantly generated in the human body. Some are made by ‘accidents of chemistry’; for example, leakage of electrons directly on to O2 from the intermediate electron carriers of the mitochondrial electron transport chain generates a steady stream of O2. 2 ...
... Free radicals and other reactive species are constantly generated in the human body. Some are made by ‘accidents of chemistry’; for example, leakage of electrons directly on to O2 from the intermediate electron carriers of the mitochondrial electron transport chain generates a steady stream of O2. 2 ...
Chapter 1 Study Guide
... Atom --> Molecule macromolecule organelle--> cell --> tissue --> organs --> organ systems --> organism Characteristics of Life - Fundamental characteristics of life are traits shared by all organisms. Characteristics of life include: - List 10 characteristics ...
... Atom --> Molecule macromolecule organelle--> cell --> tissue --> organs --> organ systems --> organism Characteristics of Life - Fundamental characteristics of life are traits shared by all organisms. Characteristics of life include: - List 10 characteristics ...
29–2 Form and Function in Invertebrates To survive
... Biologists can learn a great deal about the nature of life by comparing body systems among groups of living invertebrates. Body systems that perform the essential tasks of life have taken many different forms in different phyla. Each phylum has a particular type of breathing device, a certain type o ...
... Biologists can learn a great deal about the nature of life by comparing body systems among groups of living invertebrates. Body systems that perform the essential tasks of life have taken many different forms in different phyla. Each phylum has a particular type of breathing device, a certain type o ...
Biology
... nature is much more inclusive and loosely defined. Have you ever asked yourself questions about your surroundings and wondered how or why they are happening? This is science. Science works best when driven by curiosity and innovation. In order for you to experience science in its fullest sense you m ...
... nature is much more inclusive and loosely defined. Have you ever asked yourself questions about your surroundings and wondered how or why they are happening? This is science. Science works best when driven by curiosity and innovation. In order for you to experience science in its fullest sense you m ...
chapter 40 - Biology Junction
... internal temperature, sensing and responding to environmental stimuli, and all other animal activities require fuel in the form of chemical energy. The concept of bioenergetics—how organisms obtain, process, and use energy resources—is a connecting theme in the comparative study of animals. Concep ...
... internal temperature, sensing and responding to environmental stimuli, and all other animal activities require fuel in the form of chemical energy. The concept of bioenergetics—how organisms obtain, process, and use energy resources—is a connecting theme in the comparative study of animals. Concep ...
Chapter 24 Introduction to Animals
... Recall that the evolutionary tree is organized like a family tree, and the phylogeny of animals is represented by the branches. For example, all of the mammals in Figure 24.7 belong on the chordate branch of the tree. The trunk represents the earliest animals and the branches represent the probable ...
... Recall that the evolutionary tree is organized like a family tree, and the phylogeny of animals is represented by the branches. For example, all of the mammals in Figure 24.7 belong on the chordate branch of the tree. The trunk represents the earliest animals and the branches represent the probable ...
Section 2
... G Cellular respiration is a chemical process that uses oxygen to release energy from food, but breathing supplies cells with oxygen. H Cellular respiration requires oxygen, but breathing ...
... G Cellular respiration is a chemical process that uses oxygen to release energy from food, but breathing supplies cells with oxygen. H Cellular respiration requires oxygen, but breathing ...
June 2015 Question Paper 11
... Some organisms live at the bottom of the seas where it is very dark. To synthesise glucose, they use energy from chemicals in the very hot water that comes out of volcanoes. What is a distinguishing feature of these organisms? A ...
... Some organisms live at the bottom of the seas where it is very dark. To synthesise glucose, they use energy from chemicals in the very hot water that comes out of volcanoes. What is a distinguishing feature of these organisms? A ...
Sponges and Cnidarians
... can feed only on particles smaller than the cells themselves. Compare the structural differences between Porifera and Cnidaria. ...
... can feed only on particles smaller than the cells themselves. Compare the structural differences between Porifera and Cnidaria. ...
Helpful and Harmful Microorganisms
... We will then share our results. If most students consider bacteria is harmful you will create a poster sharing the beneficial effects of bacteria. If most students believe bacteria is beneficial you will create a poster showing the harmful effects of bacteria. ...
... We will then share our results. If most students consider bacteria is harmful you will create a poster sharing the beneficial effects of bacteria. If most students believe bacteria is beneficial you will create a poster showing the harmful effects of bacteria. ...
Life
Life is a characteristic distinguishing physical entities having biological processes (such as signaling and self-sustaining processes) from those that do not, either because such functions have ceased (death), or because they lack such functions and are classified as inanimate. Various forms of life exist such as plants, animals, fungi, protists, archaea, and bacteria. The criteria can at times be ambiguous and may or may not define viruses, viroids or potential artificial life as living. Biology is the primary science concerned with the study of life, although many other sciences are involved.The smallest contiguous unit of life is called an organism. Organisms are composed of one or more cells, undergo metabolism, maintain homeostasis, can grow, respond to stimuli, reproduce (either sexually or asexually) and, through evolution, adapt to their environment in successive generations. A diverse array of living organisms can be found in the biosphere of Earth, and the properties common to these organisms—plants, animals, fungi, protists, archaea, and bacteria—are a carbon- and water-based cellular form with complex organization and heritable genetic information.Abiogenesis is the natural process of life arising from non-living matter, such as simple organic compounds. The age of the Earth is about 4.54 billion years. The earliest life on Earth arose at least 3.5 billion years ago, during the Eoarchean Era when sufficient crust had solidified following the molten Hadean Eon. The earliest physical evidence of life on Earth is biogenic graphite from 3.7 billion-year-old metasedimentary rocks found in Western Greenland and microbial mat fossils in 3.48 billion-year-old sandstone found in Western Australia. Some theories, such as the Late Heavy Bombardment theory, suggest that life on Earth may have started even earlier, and may have begun as early as 4.25 billion years ago according to one study, and even earlier yet, 4.4 billion years ago, according to another. The mechanism by which life began on Earth is unknown, although many hypotheses have been formulated. Since emerging, life has evolved into a variety of forms, which have been classified into a hierarchy of taxa. Life can survive and thrive in a wide range of conditions. Nonetheless, 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.The chemistry leading to life may have begun shortly after the Big Bang, 13.8 billion years ago, during a habitable epoch when the Universe was only 10–17 million years old. Though life is confirmed only on the Earth, many think that extraterrestrial life is not only plausible, but probable or inevitable. Other planets and moons in the Solar System and other planetary systems are being examined for evidence of having once supported simple life, and projects such as SETI are trying to detect radio transmissions from possible alien civilizations.The meaning of life—its significance, origin, purpose, and ultimate fate—is a central concept and question in philosophy and religion. Both philosophy and religion have offered interpretations as to how life relates to existence and consciousness, and on related issues such as life stance, purpose, conception of a god or gods, a soul or an afterlife. Different cultures throughout history have had widely varying approaches to these issues.