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Biology 101 - Exam 1 Questions And Correct Answers Graded A+
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Biology 101 - Exam 1 Questions And CorrectAnswers Graded A+
Biology
- The science of life and living organisms
- There are several levels to study it on Atom
The smallest unit of an element, composed of electrons, protons, and neutrons Molecule
Unit composed of two or more atoms of the same or different element Cell
The structural and functional unit of all known living things Tissue
A group of cells with a common structure and function Organ
Made of tissues that function together in a particular task Organ System
Composed of several organs working together in coordination Organism
An individual, complex individuals contain organ systems
Population
Organisms of the same species in a particular area
Community
Interacting populations in a particular area
Ecosystem
A community plus the physical environment
Biosphere
Regions of the Earth's crust, waters and atmosphere inhabited by living things.
Unicellular
Composed of a single cell
Multicellular
Composed of multiple cells
, Response to Stimuli
Plants responding to light
Metabolism
The sum of all chemical reactions that lead to energy
Living Things Require Materials and Energy
- Frogs eating caterpillar
- Predation (eating)
Organisms take in substances from environment and transfer energy from that
substance
Chemical cycling and energy flow is necessary for a functional ecosystem
Living Things Maintain Homeostasis
Examples of continued states: temperature, water potential, sugar concentration, pH
Maintained through complex feedback systems within organism (A&P)
Homeostasis
Keeping internal biological environment stable
Living Things Respond to Their Environment
Appropriate responses ensure survival of the organism and allow it to continue its daily
activities Responses maintain homeostasis Escaping predation Behaviors The activities
conducted in response to the environment Living Things Reproduce and Develop Living
things pass along their genetic information in the form of genes to their offspring
Mutations to genes increase diversity in a population Living things always start as an
underdeveloped form and grow/develop overtime
- Ex: Seeds to plants Living Things Adapt and Evolve - Organisms adapt to make them
better able to function in a particular environment - Evolution is driven by Natural
Selection Evolution a series of adaptions over time that lead to changes in a population
Order - Close up of a sunflower illustrates the highly ordered structure that
characterizes life - All living things are made of cells and cells combine to make tissues,
etc
- Structure follows function
Taxonomy
- The process of grouping organisms
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