Biology Proctored Exam Penn Foster With 100% Correct Answers

What do leaves do? {Ans: Manafacture food for plant growth and repair}Provide examples of threats to biodiversity {Ans: Climate change: seasons, rising of sea levels, and glaciers melting Deforestation and habitat loss, agriculture, mining, deforestation and water extraction are all causes of habitat loss Pollution: from burning of fossil fuels and dumping plastic into our oceans- pollution disrupts the earth ecosystem Overexploitation: refers to the act of over-harvesting species and natural resources at rates faster than they can actually sustain themselves in the wild}What is disruptive selection? {Ans: Occurs when 2 or more extreme phenotypes are favoured over intermediate types - The curve has 2 peaks}What are the different kinds of carbs? {Ans: Glucose= monosaccharide that serves as blood sugar Sucrose= disaccharide which is table sugar Polysaccharides= include starch, which stores energy in plants Glycogen= stores energy in animals Cellulose= makes up the structure of plant cell walls}Lipid {Ans: Energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen. Serve as a long term energy source}What is sexual selection? {Ans: Adaptive changes in either sex that lead to an increase in the ability to attract and secure