ecology unit test Flashcards
a carnivore that has no predators
top predator
an animal which is hunted
prey
a pictorial description of the transfer of energy in a food chain in called
an energy pyramid
two events which add new individuals to a population are
natality and immigration
the size of a population decreases as a result of
mortality and emigration
the number of organism occupying a habitat is referred to as
the population density
this biome is a vast treeless plain
grassland
this time is the characteristic of succulent plants because it is hot and dry
desert
this biome has a high rain fall and the greatest diversity of life
tropical rain forest
this biome contain trees that loses there leave in the winter
temperate forest
this biome has a layer of frozen soil
tundra
the last organism in most food chains
top predator
the soil portion of the earth.
lithosphere
the layer of water supporting life on earth
hydrosphere
food energy levels
trophic levels
true or false: nutrients cycling is a common process in most ecosystems
True
true or false: the size of a population is dependant on the abiotic factors of an ecosystem
false
true or false: aquatic ecosystems have the same amount of biotic and abiotic factors
true
what is an example of a density dependant factor
an infectious disease
scavengers: importance, what would happen is disappeared
- keeps ecosystems free of dead bodys
- dead organism would accumulate
decomposer: important, what would happen if they disappeared
- break down organic materiel and return nutrients to the soil for producers
- nutrients in soil would decrease and producers would die off
producer: importance, what would happen if they disappeared
- convert light energy in to chemical energy and 02
- all life would disappear
top carnivores: what would happen if they disappeared
- they regulate ecosystems
- herbivore would increase and producer population would decrease
in the carbon cycle what are the 2 chemical reactions
cellulaire respiration and photosynthesis
