Ch.2: Chemistry of Life
What macromolecule is responsible for holding genetic information?
Nucleic Acids
Biotic factors are factors that are _________ while abiotic factors are factors that are __________.
living, nonliving
What type of organisms starts a food chain?
A producer
Populations cannot grow exponentially forever. usually populations will level off around the ____________
Carrying Capacity
What is the difference between a prokaryote and a eukaryote?
Prokaryotes do not have a nucleus or membrane bound organelles. Eukaryotes do have DNA enclosed in a nucleus with membrane bound organelles.
Is glucose classified as a monomer or polymer?
monomer
How do greenhouse gases affect the Earth's atmosphere?
They trap heat radiated from the Earth's surface
Make a 3 step food chain using ecosystem vocabulary words
producer --> herbivore --> carnivore
What factors affect growth rate of a population?
Birth rate, Death rate, Immigration rate, Emigration rate
What organelles can only be found in plant cells?
Chloroplasts, cell walls, vacuoles
What atoms makeup sugar molecules?
C, H, O
Where do phytoplankton live?
In depths where light reaches the ocean
What is the difference between a food chain and a food web?
Food chain is one energy transfer, food webs are all possible energy transfers
What is a keystone species?
A species that helps to maintain species diversity among the ecosystem
How do cells obtain energy from food?
They break chemical bonds in food, releasing energy and allowing ATP to be synthesized
What atoms make up amino acids?
C, H, O, N
What two properties are you able to see on a climate graph?
Temperature and precipitation
How does the biomass change as you move up trophic levels?
It decreases
What is the difference between primary and secondary succession?
Primary succession starts without soil, secondary succession starts with soil
During a hard workout you may increase your breathing and heart rate to help maintain ______________
homeostasis
Which macromolecules ONLY contain carbon, oxygen and nitrogen?
Carbohydrates and lipids
How do the hydrosphere, atmosphere, biosphere and geosphere interact?
Matter and energy are able to flow from one system to another
If primary producers produce 80,000 energy units, how many energy units are available to third level consumers
80 energy units
What factors affect the carrying capacity?
Density Dependent: resource availability (food, water, shelter, space), predators, disease, and competition
Density Independent: Natural disasters
What happens when a cell is placed in an isotonic solution?
Water will move across the membrane in both directions since the cell and surroundings are at equilibrium