![]() For example, a branch of biology called virology studies viruses, which exhibit some of the characteristics of living entities but lack others. Organisms are linked by lines of descent from common ancestry.ġ.B.1 Organisms share many conserved core processes and features that evolved and are widely distributed among organisms today.ģ.1 The student can pose scientific questions.ġ.14 The student is able to pose scientific questions that correctly identify essential properties of share, core life processes that provide insights into the history of life on Earth.ĥ.3 The student can evaluate the evidence provided by data sets in relation to a particular scientific question.ġ.18 The student is able to evaluate evidence provided by a data set in conjunction with a phylogenetic tree or simply cladogram to determine evolutionary history and speciation.īiology is the science that studies life, but what exactly is life? This may sound like a silly question with an obvious response, but it is not always easy to define life. The process of evolution drives the diversity and unity of life. A Learning Objective merges required content with one or more of the seven Science Practices. The Learning Objectives listed in the Curriculum Framework provide a transparent foundation for the AP ® Biology course, an inquiry-based laboratory experience, instructional activities, and AP ® Exam questions. The information presented and the examples highlighted in this section support concepts and Learning Objectives outlined in Big Idea 1 of the AP ® Biology Curriculum. A Learning Objective merges content with one or more of the seven Science Practices. The AP ® program has identified seven major categories of Science Practices, which can be described by short phrases: using representations and models to communicate information and solve problems using mathematics appropriately engaging in questioning planning and implementing data collection strategies analyzing and evaluating data justifying scientific explanations and connecting concepts. The scientific method begins with an observation and follows with a hypothesis to explain the observation then experiments are conducted to test the hypothesis, gather results, and draw conclusions from data. Scientific inquiry usually uses a series of steps to gain new knowledge. The redesigned AP ® Biology course also emphasizes the investigative practices that students should master. All biological systems interact, and these interactions result in emergent properties and characteristics unique to life, Big Idea 4. Living systems also store, transmit, and respond to information, from DNA sequences to nerve impulses and behaviors, Big Idea 3. ![]() Evolution explains both the unity and diversity of life, Big Idea 1, and all organisms require energy and molecules to carry out life functions, such as growth and reproduction, Big Idea 2. Simple descriptions define the focus of each Big Idea: Big Idea 1, Evolution Big Idea 2, Energy and Homeostasis Big Idea 3, Information and Communication and Big Idea 4, Systems and Interactions. Each Big Idea identifies key concepts called Enduring Understandings, and Essential Knowledges, along with supporting examples. The AP ® Biology curriculum is organized around four major themes called the Big Ideas that apply to all levels of biological organization-from molecules and cells to populations and ecosystems. Recognize and interpret a phylogenetic tree.Describe the levels of organization among living things.Identify and describe the properties of life.Here are a few.By the end of this section, you will be able to: I know this is a lot to take in, but there are several videos and articles on Khan Academy to help. DNA is a complete set of instructions needed for life (unless you're a virus, but that's a whole different story/debate) and RNA is used to copy DNA and to synthesize proteins. RNA is single-stranded and is generally straight. Uracil links to adenine in RNA just like thymine does in DNAįinally, DNA is double-stranded and forms a double helix structure. Thymine had the chemical formula C5H6N2O2 and uracil is C4H4N2O2. Instead, it has uracil, a nucleiotide base with a slightly different chemical makeup. ![]() You probably know that DNA has guanine, cytosine, adenine, and thymine, and that guanine links to cytosine and adenine links to thymine. Second, while each has four nucleiotide bases, there is one difference. These names describe the sugar that makes up their backbone-DNA = deoxyribose and RNA = ribose. To start, DNA stands for deoxyribonucleic acid, while RNA stands for ribonucleic acid. I will answer you the way I have answered this question before with other users.
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