Pond life - Study guides, Class notes & Summaries

It is believed that an asteroid or comet impact caused the extinction of the dinosaurs 65 million years ago. What are the two major lines of evidence supporting this theory? - There is a layer of clay at the time of the dinosaurs with high concentration of iridium from asteroids in it, and scientists have found a large impact crater that hit Earth 65 million years ago. . Of the four Earth biomes shown below, which has the greatest number of species? - Rainforest A student collects the foll...

Define the term biodiversity - diversity of important ecological entities that span multiple spatial scales, from genes, to species to communities - biological diversity encompasses all species of plants, animals, and microorganisms, and the ecosystems and processes of which they are part Explain how the terms species, richness, evenness, and diversity are related Species richness: a count of all the different species in a prescribed area Species evenness: a measure of the rareness or c...

FAU BROOKS BIODIVERSITY UNIT 1 EXAM LATEST UPDATE GRADED A+ T or F: We have proven how life arose? FALSE ! Haldon-Oparin Hypothesis life arose spontaneously from methane, ammonia, water & energy sources Milley-Urey experiment Tested Haldane-Oparin hypothesis Contemporary scientist think that methane & ammonia were likely ABSENT in early atmosphere Organic molecules: CO, CO2, H2 (not much), N2 and H2O Panspermia idea that organic molecules were brought to earth by meteorites/aster...

Micro CHSP 1 Exam Questions and Answers All Correct Which of the following statements about biofilms is FALSE Compared to free-living bacteria, biofilms are more sensitive to antibiotics. Biofilms in pipes can block the flow of water. Biofilms in your body protect mucous membranes from harmful microbes. Biofilms on medical devices cause infections. Biofilms on rocks provide food for animal life. - Answer Compared to free-living bacteria, biofilms are more sensitive to a...

EC-6 Science Final Exam Questions And Answers . Sarah looked at some pond water with a microscope. She used the low power objective lens to look at some green algae. The picture below shows that Sarah saw through the microscope. What is the role of the pond organisms that Sarah saw in her field of view? - CORRECT ANSWER Producer Sarah looked at some pond water with a microscope. She used the low power objective lens to look at some green algae. The picture below shows that Sarah saw thro...

Biofilms provide pathogens with an adhesion mechanism and aid in resistance to antimicrobial agents T/F - ANSWER-True Microbes are associated with life-sustaining benefits as well as life-threatening diseases T/F - ANSWER-True The primary role of microbes on the planet involves causing disease in animals and humans T/F - ANSWER-False Common commercial benefits of microorganisms include synthesis of - ANSWER-Riboflavin, acetone, and insulin The term used to describe a disease-causi...

Texas Wastewater Class B Exam (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct | Grade A Q: Ways to reduce bad odors coming from a collection system Answer: routinely cleaning slow running or low flow lines, adding chlorine or hydrogen peroxide to the collection system Q: Types of pipe that are commonly used in wastewater collection system Answer: ductile iron, Poly Vinyl Chloride (PVC) Q: Before entering a confined space a worker should A...

Anton van Leeuwenhoek -first to view single-celled "animalcules" in pond water -Shows paramecium, and also looked at human blood and sperm cells Theodor Schwann -organisms are composed of cells Rudolf Virchow -cells come from preexisting cells Cell Theory -All organisms are composed of cells (cells are the structural unit of life) -Cells are the functional unit of life •cells are the smallest entities that have all the properties of life •each cell is (or can potentially generate)...

Texas Wastewater Class A Exam Prep (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct Q: Before entering a confined space a worker should Answer: Use approved monitoring device and check for the presence of dangerous gasses, ventilate the space with a blower, wear a safety harness and attach a life line Q: A properly designed and operated primary sedimentation tank should remove _____ percent of incoming BOD Answer: 30-40% Q: Devices that may be...

When organic wastes are discharged to receiving waters, O2 is depleted by _____. bacteria Hydrogen sulfide gives off an odor similar to____. rotten eggs 3 diseases potentially carried by wastewater are _____. typhoid fever, disentery, cholera Immediate first aid for butrns is to ____. flood with cold water What most likely causes an electic motor failure? mopisture What mixed liquor characteristics indicate a healthy activated sludge process? brown color, frothy appearance, and musty odor ...