IB 150 Exam 1 UIUC with Questions and Answers

IB 150 Exam 1 UIUC with Questions and Answers 1. Describe 2 distinct aspects of living organisms that set them apart from non-living objects: biotic (living): need for energy, ability to replicate (grow), reproduce abiotic (living): no need for energy, no ability to grow (replicate) no reproduction Organisms: -are highly ordered (non-random) systems -self replicate -populations of organisms adapt to their organisms -organisms grow and develop -organisms maintain a controlled internal environment (homeostasis) -organisms react to their environment 2. what is the smallest unit/level that we recognize as"being alive"?cell 3. Which of the following structures is only associated with eukaryotic cells? mitochondria/other organelles DNA Mitochondria/other organelles + nucleus containing the DNA nucleus containing the DNA cell membrane - prokaryotes:DON'T have any membrane enclosed internal organelles, but DO have DNA to store their genetic material, and an external membrane 4. The core properties that seem to set life apart from non-living matter can be organized according to 2 general attributes: (1)those that require the ability to pass on hereditary (genetic) informationand (2) those that require the input of energy in order to proceed Try to categorize each of the following properties that we just covered with respect to these 2 attributes: reproduction and growth: evolution: maintaining a stable internal environment that is different from the external environment (homeostasis): reacting to the environment: