BIO1500 Test 1 Questions and Answers 100% Pass

BIO1500 Test 1 Questions and Answers 100% Pass What is the heritable variation among individuals of a single population or within the species as a whole? - Genetic Diversity What makes heritable variation possible? - Genetic mutations Natural selection acts on ________ while _______ evolve. - Individuals; populations A genetic mutation that allows lions to better hunt prey (gazelles) becomes prevalent in a population. In order to survive gazelles must do what? - Coevolve to avoid the lions more effectively The more genetically diverse a population the more likely... - Favorable traits will be selected for evolution The population will survive The intentional breeding for certain traits, or combination of traits is... - Artificial selection What are stretches of DNA that influence traits of an individual? - Genes 2100% Pass Guarantee Sophia Bennett, All Rights Reserved © 2025 Why is a hypothesis different from a theory? - A hypothesis is an explanation for an observation A theory is a well accepted hypothesis supported by extensive research Living things use chemical reactions to... - Store energy Produce energy (release) Synthesize molecules and to grow The wastes from one living organism are food to others. This is essential to life on earth because... - Nutrients must be recycled Once a chemical reaction is complete there are - The same number of atoms What is a population? - A group of organisms of the same species What is a community? - The interactions of different populations of species What is an ecosystem / environment? - The interactions of populations and non living things What do decomposers in an ecosystem do? - Recycle nutrients Why might a carbon atom in you body today have been part of a dinosaur millions of years ago? - Because matter is never created nor destroyed just recycled / transformed 3100% Pass Guarantee Sophia Bennett, All Rights Reserved © 2025 Conservation law of matter Why has human population become a J curve over the last 200 years? - Modern agriculture and modern medicines What is carrying capacity? - The size of a population determined by environmental resistance Variable due to changes in the environment The demographic transition refers to a country's change from - High birth and death rates to low birth and death rates Many demographers believe that birth rates generally decrease as the level o