originally used to refer to processes within living organisms‚ it is frequently applied to automatic control systems such as thermostats. Homeostasis requires a sensor to detect changes in the condition to be regulated‚ an effector mechanism that can vary that condition; and a negative feedback connection between the two. All living organisms depend on maintaining a complex set of interacting metabolic chemical reactions. From the simplest unicellular organisms to the most complex plants and animals‚ internal
Premium Homeostasis Blood sugar Organism
In life’s hierarchy‚ cells make up the lowest level of organization. Cells can perform activities required to sustain life. A cell’s ability to divide to form new cells is the basis for growth and repair in organisms. Cells also play a key role in the recycling of carbon‚ a chemical element essential to life‚ and also participate in cellular processes such as photosynthesis. With these points in mind‚ it should be noted that cells come in one of two forms: prokaryotic and eukaryotic. By investigating
Free Bacteria Cell DNA
Life on Earth. 1. Analysis of the oldest sedimentary rocks provides evidence for the origin of life. * Identify the relationship between the conditions on early Earth and the origin of organic molecules. * Scientists estimate that the universe is 10-20 billion years old and arose as a big bang‚ which is still expanding the universe. * The early Earth was very different from the Earth today and no oxygen was present. This means that there was no ozone layer exposing the Earth’s surface
Premium Bacteria Eukaryote Cell
primary form of reproduction for single-celled organisms such as the archaea‚ bacteria‚ and protists. Many plants and fungi reproduce asexually as well. While all prokaryotes reproduce asexually (without the formation and fusion of gametes)‚ mechanisms for lateral gene transfer such as conjugation‚ transformation and transduction are sometimes likened to sexual reproduction. A lack of sexual reproduction is relatively rare among multicellular organisms‚ for reasons that are not completely understood
Premium Cell Reproduction Bacteria
to place‚ birds fly away‚ when they are going to be caught‚ frog jumps into the water when it feels danger. MOVEMENTS IN ANIMALS There are so many types of animals such as unicellular‚ small‚ medium size and very large size animals all show movements either they are aquatic‚ arboreal or terrestrial. MICROSCROPIC ORGANISMS Microscopic animals such as Amoeba‚ Paramecium and euglena show following types of movements. (A) Amoeba: Amoeba is found in water. It shows creeping movements. Locomotory
Premium Eukaryote Animal Organism
causes another to start or stop. D) While organisms are balanced‚ they are not unchanging. The term used to describe the balanced state is dynamic equilibrium. 1. Dynamic Equilibrium: A balanced state created by many small‚ opposing changes. II. Life Processes: All living things carry out the same basic chemical processes. Taken together‚ these processes make up an organism’s metabolism. A) Metabolism: All the chemical processes that take place in an organism. 1. Nutrition: Using nutrients for growth
Premium Cell Metabolism Organism
true? A cell is _____. A) only found in multiples of two‚ because single cells cannot exist independently B) always between 200 and 500 micrometers in diameter C) characteristic of eukaryotic but not prokaryotic organisms D) characteristic of both prokaryotic and eukaryotic organisms Answer: D Reference: Section 1.4 Bloom’s Taxonomy: Level 1 Knowledge 2) How does a scientific theory differ from a scientific hypothesis? A) Theories are proposed to test scientific hypotheses. B) A theory
Premium Organism Evolution Life
of life is the study of chemical substances and vital processes occurring in living organism. Biochemistry governs all living organisms and living processes. * Study of chemical processes in living organisms‚ including‚ but not limited to‚ living matter. * Biochemistry is the science dealing with the chemical composition and chemical reactions happening within‚ and between the living cells of all organisms. → The study of the chemistry behind biological processes and the synthesis
Free DNA Cell Protein
fields like biomedical sciences‚ magnetics‚ optoelectronics‚ nanochips production‚etc. Nanoparticles are been commonly used in various drug therapies.Uptil now‚ pioneers from this field have atttained success of synthesising nanoparticles from micro-organisms like fungi‚ bacteria‚ yeast‚ etc. Nanowires and nanotubes can be prepared by extraction of this nanoparticles from their source. This study is concerned with extraction of intracellularly produced silver nanoparticles from the fungus Verticillium
Premium Bacteria Fungus Gold
Life on Earth 1. Analysis of the oldest sedimentary rocks provides evidence for the origin of life. Identify the relationship between the conditions on early Earth and the origin of organic molecules. - Conditions of early Earth: Massive oceans existed Only small landmasses above the surface of the water No ozone layer Large amounts of radiation reached the Earth No free oxygen in the air Large amounts of volcanic activity; heat‚ ash‚ dust and gases into atmosphere Violent electric
Premium Oxygen Bacteria Organism