Which describes symbiosis? - answer Two organisms belonging to different species live
closely together and have specific interactions.
What is the most specific ecological level? - answer an organism
A tick feeding off the blood of a dog is an example of which type of relationship? -
answer parasitism
In which of the following situations would primary succession occur? - answer on an
island just formed by a volcano
Which of the following describes organisms that need to obtain energy from other
organisms?
Select all that apply. - answer heterotrophs
consumers
What term describes the conversion of inorganic carbon to organic carbon? -
answerprimary production
Approximately how much of the Earth's primary production occurs in the oceans? -
answer50%
What are organisms that use chemical energy instead of sunlight produce
carbohydrates? - answerchemoautotrophs
Which type of organism feeds on waste and dead organic matter? - answerdetritivores
CHECKPOINT 23 - answer
What is a trophic level? - answera reflection of where an organism is in the sequence of
energy transfers
Which is an illustration that shows the amount of energy contained at each trophic
level? - answerenergy pyramid
What is the name for an organism that eats producers? - answerprimary consumer
, What organisms are at the first trophic level? - answerorganisms that use energy from
the Sun
On average, how much energy is transferred from one trophic level to the next? -
answer10%
What would happen if a producer were removed from an ecosystem? - answerLess
energy would be available.
What occurs in evaporation? - answerwater changes from liquid to water vapor
How is nitrogen gas fixed biologically? - answerbacteria in plant roots and soil
CHECKPOINT 24 - answer
The short-term conditions in Earth's atmosphere at a certain time and place is the
definition of _[blank]_. - answerthe weather
What best describes an urban area where concrete and asphalt absorb the Sun's
energy and reradiates it as heat back to the surrounding air? - answera microclimate
In December, which hemisphere is tilted away from the sun? - answerNorthern
Hemisphere
Which of the following describes how Earth's temperature is maintained by the
greenhouse effect? - answerGases such as carbon dioxide and methane reflect heat
from the Earth back towards Earth's surface.
Which of the following is not a terrestrial biome? - answeran estuary
Temperate forests are characterized by _[blank]_. - answerpronounced seasons with
year-round rainfall
In which freshwater ecosystem is it possible for the soil to be saturated with water for
only part of the year? - answerwetlands
Estuaries are characterized by _[blank]_. - answerthe presence of fresh water and salt
water
The _[blank]_ is the zone where no sunlight penetrates the water. - answeraphotic zone
CHECKPOINT 25 - answer
What factors affect carrying capacity?
Select all that apply. - answerpredators in habitat
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