Scattergood Biology 2022-2023
210 flashcards · Biology · by Ben Heller
The study of life
Biology
Study of organisms and how they relate to themselves and their surroundings
Ecology
Group of the same species of organisms that interact with one another
Population
Resources that keep a population from growing infinitely
Limiting Factors
The population size that is caused by limited resources
Carrying Capacity
The growth curve that levels off at the carrying capacity
Logistic Growth
The growth curve that grows forever at a fast pace
Exponential Growth
A species’ ideal living situation
Fundamental Niche
A species’ living situation caused by competition
Realized Niche
Species working together, best friends!
Mutualism
One species benefits, other doesn’t benefit or suffer
Commensalism
One species leaching nutrients off another
Parasitism
Actually dangerous warning colors
Mullerian Mimicry
Mimicking of dangerous colors while not actually being dangerous
Batesian Mimicry
2 species evolving together
Coevolution
Populations of one species interacting with populations of other species
Community
Something that changes the ecosystem
Disturbance
Lots of different species
Biodiversity
What happens after a disturbance in the ecosystem
Ecological Succession
The number of different species in a sample
Richness
Living things vibing with nonliving things
Ecosystem
Toxins accumulating up the food chain
Biomagnification
The position of an organism on the food chain
Trophic level
Rock that formed from dead tiny sea creatures being compressed at the bottom of the ocean
Limestone
Water being pulled out of plants by evaporation
Evapotranspiration
The element often the limiting nutrient for land plants, super present in the atmosphere but in accessible to plants without the help of _______-fixing bacteria
Nitrogen
The element that is often the limiting nutrient for aquatic life, primarily found in rock where it is dissolved and cycles through the environment
Phosphorus
Organisms that produce lots of offspring with only a few surviving
R-strategy species
Organisms that produce only a few offspring in their lives but put a lot of effort into them
K-strategy species
The entire group that you want to study, everything!
Population
A small portion of the population that you study because you can’t see the whole population
Sample
A value calculated based on the population
Parameter
A value calculated from the sample
Statistic
Measures something numerical, on a sliding scale
Quantitative Variable
Puts things into categories
Categorical Variable
The problem that arises when the sample excludes a certain group of people
Undercoverage Bias
When the phrasing of the question leads to people giving a certain answer
Wording Bias
One of three domains, similar to bacteria put live in extreme conditions like geysers
Archaea
Classification of animals
Taxonomy
Branching diagram that shows shares traits among animals
Cladogram
Diagram that shows evolutionary descent with time
Phylogenetic tree
Process in which certain inherited traits make it easier for some individuals to thrive and multiply and change genetic makeup of populations over time
Natural Selection
Relative ability to survive and create offspring
Fitness
How organisms seems to be ideally shaped to survive and reproduce in their environment
Adaptations
How an individual organism adjusts to change in environment
Acclimation
When being a small population leads to big proportional changes in allele frequency
Genetic Drift
The changes in allele frequencies stay constant due to no evolutionary mechanisms
Hardy-Weinberg Equilibrium
A version of a gene
Allele
When two new species arise due to geographic separation causing their populations to diverge
Allopatric Speciation
The necessary condition for speciation to occur
Reproductive Isolation
When two new species arise due to behavioral differences leading to separation
Sympatric Speciation
When two species are unable to mate at all
Prezygotic Isolation
When two species are able to mate but the resulting fetus doesn’t develop or survive or the offspring is sterile
Postzygotic Isolation
Why is Carbon so important for life?
It’s small and therefore can make lots of different shapes It can bond with lots of different elements It’s not overly greedy in making those bonds
Bond caused by negative and positive ions being attracted to one another, giving/taking electrons
Ionic Bond
Bond caused by elements sharing electrons to fill electron orbits
Covalent Bond
With hydrogen sharing an electron to bond with another element, the whole molecule has a slight charge and that leads to attract between the same type of molecules, example is water with water
Hydrogen bonds
Name 3 of the 6 properties of water that make it so important to life.
Cohesion Adhesion Universal Solvent Heat Capacity Ice’s Density High Surface Tension
The same type of molecules being drawn to each other
Cohesion
Attraction between two different types of molecules
Adhesion
Water-fearing, molecules that repel/don’t mix with water
Hydrophobic
Water-loving, molecules that mix/dissolve in water
Hydrophilic
Complex molecules required to work and grow the body, one of the 4 main biological molecules
Proteins
Fatty acids, used in long term storage
Lipids
Gelatinous fluid in which the cell organelles float around in
Cytoplasm
Smallest singular unit of life, they also can come together to become tissues to create more complex forms of life
Cell
Cell organelle, attached to outside of nuclear envelope, helps ribosomes makes proteins
Rough Endoplasmic Reticulum
Cell organelle, found on nuclear membrane, floating around, and the Rough ER, synthesizes proteins
Ribosome
Cell organelle, floating in cytoplasm, responsible for packaging, processing, and shipping proteins
Golgi apparatus
Cell organelle, encloses waste in a membrane that destroys the waste products with enzymes
Lysosome
Cell organelle, Found floating in the cytoplasm, responsible for synthesizing compounds, especially lipids
Smooth Endoplasmic Reticulum
Cell organelle, Enclosed in double membrane, control center of the cell, holds the DNA
Nucleus
Cell organelle, Powerhouse of the cell, scattered throughout cytoplasm
Mitochondria
Center part of the nucleus, makes RNA
Nucleolus
Makes up membrane, Hydrophilic outside, hydrophobic fatty tails inside
Phospholipid Bilayer
Spaces which allow molecules to move through cell membrane
Channel Proteins
Passage of water through membrane
Osmosis
Bringing larger molecules in by engulfing them in the cell membrane
Endocytosis
Vesicular transport forcefully kicked out of the cell, vesicle joins membrane
Exocytosis
Molecules moving from high to low concentration areas, things spreading out to be equal
Diffusion
Adenosine Triphosphate, common energy source made and used by the cell
ATP
Moving particles using energy
Active Transport
Movement not requiring energy, diffusion is an example
Passive Transport
simple sugar compound, main energy source of ATP
Glucose
The process in which cells turn sugar into energy in the form of ATP
Cellular Respiration
The end product of glycolysis, 3 carbon molecule
Pyruvate
First Step of Cellular Respiration, Glucose is split, happens in cytoplasm, produces tiny bit of ATP, doesn’t need oxygen
Glycolysis
Theoretically, how much ATP and NADH do the cell gain from Glycolysis?
2 ATP and 2 NADH (it produces 4 ATP but we need 2 ATP to break down the Glucose in the first place
Second step of Cellular Respiration, takes place in Mitochondria, main product is NADH
Krebs Cycle
3rd step in cellular respiration, produces the most ATP, takes place in Mitochondria membrane
Electron Transport Chain
Instructions for life, double helix, inside nucleus for eukaryotes
Deoxyribonucleic Acid, DNA
humans have 23 pairs, yarn-like ball of DNA and proteins
Chromosome
DNA-like with single strand, copy of the "recipe" of life
Ribonucleic Acid, RNA
Base pair within DNA, pairs with Thymine
Adenine (A)
Base pair within DNA, pairs Adenine
Thymine (T)
Base pair within DNA, pairs with Guanine
Cytosine (C)
Base pair within DNA, pairs with Cytosine
Guanine (G)
Nitrogenous base pair within RNA, pairs with Adenine
Uracil (U)
What are the three main parts of DNA?
A 5 carbon sugar (deoxyribose), a phosphate group, and a nitrogenous base
The allele that can take over, it masks the recessive
Dominant allele