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36 Cards in this Set

  • Front
  • Back

Ribosomes

site of protein synthesis in cytoplasm.

Nucleolus

produces ribosomes inside the nucleus

ER

site of ribosome attachment; can be smooth or rough

cell membrane

projections that allow the cell to move or to move substances along the surface of the cell

Seven properties of all living things

1. Order


2. Regulation


3. Energy processing


4. Growth and development


5. Reproduction


6. Response to environment


7. Evolutionary adaptation

tissue

group of cells functioning together to carry out a physiologic process. Tissues get organized into organs.

Organs

More than one tissue working together to carry out a physiologic process. Organs get organized into organ systems.

Organ Systems

multiple organs working together.

Cellular Organization

Atoms>>Molecules>>Macromolecules>>Organelles>>Cell

Organismal Organization

Cell>>Tissue>>Organ>>Organ System>>Organism

Populational Organization

Organism>>Population>>Species>>Community>>Ecosystem

Organism

An individual living thing consisting of one or more things. Within this living thing you have larger levels of organizations.

A populations

All the individuals of one species living in a specific geographic area.

Community

All individuals of all the species living in a specific geographic area.

Ecosystem

All the communities plus non-living components of a specific geographic area. Your intestinal system is an ecosystem.

Emergent properties

All living things exhibit. Properties not present at simpler levels of organization. The whole is greater than the sum of its parts.

Reductionism

The reduction of complex systems to simpler components that are more manageable to study

Systems Biology

A system is a combination of components that function together.

Reductionism vs. Systems Biology

Reductionism would say take drugs to combat problem. Systems biology would say, we must look at how the drug will affect other organs.

Why talk about evolution?

~Makes sense of everything we know about biology


~Organisms are modified decedents of common ancestors.


~Explains patterns of unity and diversity among living organisms.


~Explains similar traits among organisms by decent from common ancestors.


~ differences among organisms are explained by the accumulation of heritable changes.

Taxonomy

Branch of biology that names and classifies species into groups of increasing breadth. Organize/label




Domains followed by kingdoms are the broadest units of classification.

The Three Domains

Domain Bacteria, Domain Archaea, and Domain Eukarya.




~Bacteria (oldest lineage) and Archaea compose prokaryotes.




~Domain Eukarya includes all eukaryotic organisms.



Prokaryotes

Most are single celled, microscopic, and have no nucleus.

Domain Eukarya

Includes three multicellular organisms.


1. Plants which produce their own food through photosynthesis.


2. Fungi which absorb nutrients


3. Animals which ingest their own food

Unity Among Organisms

DNA is the universal genetic language common to all organisms.




Unity is evident in many features of a cell structure (cell membranes).

Theory of Natural Selection

Darwin 1859~Published The Origin of Species by Means of Natural Selection.


~Species showed evidence of "decent with modification"


~Natural selection is the mechanism behind decent with modification




Darwin's Theory explains the duality of unity and diversity.




Alfred Russel Wallace

Darwins Observations

1. Individuals in population vary in traits, many of which are heritable.




2. More offspring are produced than can survive, and competition is inevitable.




3. Species generally suit their environment

Darwins Inferences

Individuals that are best suited to their environment are more likely to survive and reproduceOver time, more individuals in a population will have the advantageous traitsEvolution occurs as the unequal reproductive success of individualsIn other words, the environment “selects” for the propagation of beneficial traitsDarwin called this process natural selection

How does the use of antibiotics lead to the evolution of antibiotic resistance?

Sick bacteria>>Antibiotics kill off all sensitive cells>>One bad cell survives and reproduces




Antibiotics shed cell wall

Scientific Method 6 things

Question>>Hypothesis>>Collect Data>>Interpret Results & Review Hypothesis>>Peer Review>>Publish Findings

Theory

Hypothesis that has been repeatedly tested and supported by overwhelming evidence.

Systems Biology

The exploration of the network of interactions that underlie the emergent properties of a system.

Gene

A section of DNA that encodes the information necessary to build a molecule synthesized within the cell.

Energy usually enters an ecosystem as ________ and exits as _________.

light, heat

deductive reasoning

Reasoning from a general premise to a specific result we should expect if the premises are true.

In a controlled experiment, the factor being measured that is predicted to be affected by the factor manipulated by the researchers.

Dependent variable