Blue planet module 5
In its most general form, a __________ cycle is the complete pathway that a chemical element follows through the Earth system.
biogeochemical
The death of the dinosaurs opened up the door for what species to dominate (and fill in the newly empty niche)?
mammals
DNA consists of two chainlike molecules called biopolymers. What are the structural units that are stacked together in the DNA molecule called?
nucleotides
In Explore: Food Chain Game, what does the eagle provide for the mushrooms?
nutrients to grow
Of the following types of interactions, which one is most likely to limit population size?
predation
Carbohydrate production and the consequent building of body mass by autotrophs is called __________ production.
primary
With regards to a food chain or food web, the organisms that capture and lock up energy from the Sun are called
primary producers
The production of body mass by heterotrophs is called ___________ production.
secondary
In Explore: Biome Animation, what are the principle biome types?
. Forest, savanna, grassland, desert, and tundra Correct
The Geological History of Earth, what made up the early Earth's compositional layers?
Oxygen, Magnesium, Silicon and Iron Correct
The realized niche of an organism is
The life pattern that the organism actually assumes. It is a subset of the fundamental niche. Correct
In Explore: Population Growth, what happens with the world's population in 1930?
The population doubles to 2 billion people, only in 110 years Correct
In View: Mistletoe, Parasites, and Keystone Species: Bite Sci-zed, what is mistletoe?
a. A plant b. All of these Correct c. It is hemiparasitic d. A parasite
During the __________ Eon, there was no free oxygen in the Earth's atmosphere.
a. Proterozoic b. Archean c. Phanerozoic d. None of these. --Correct
Which of the following groups of organisms became the dominant land plant at the end of the Cretaceous Period?
Angiosperms
Which of the following sources contains large amounts of carbon?
Coal. b. The oceans. c. Fossil fuels.
Mutations can be considered as one of the components of evolution because they
Contribute to new variations in organisms. Correct
Why is it difficult to pull nitrogen from the atmosphere into the nitrogen cycle of the biosphere?
Few organisms can "fix" atmospheric nitrogen gas. Correct
Which of the following is not a result of high population density?
Predators will ignore prey that is abundant. Correct
The hypothesis that suggests that life formed near the Earth's surface in pools of water is called
The Primordial Soup Hypothesis.
In Explore: Photosynthesis, what happens to the carbon in CO2 in photosynthesis?
The carbon in CO2 gets fixed into a solid form as a carbohydrate. Correct
Which of the ecosystems listed below has the greatest biomass?
Tropical rainforest
What are the four major classes of Earth's terrestrial biomes.
Tundra, forest, grasslands, and desert.
Of the six kingdoms now recognized
Two are for prokaryotes and four are for eukaryotes. Correct
Which of the following biomes receives the least amount of precipitation?
arid desert
The organisms that convert energy into food are called
autotrops
A site of the origin of life on Earth could have possibly bee
b. Near deep-sea vents. Correct
In Explore: Biome Animation, which natural vegetation covers the state of Florida?
b. Subtropical evergreen forest Correct
When did free oxygen begin to accumulate in the Earth's atmosphere?
c. When photosynthesis began. Correct
n a world-wide basis, which of the following factors has the greatest influence over the distribution of biomes?
climate
In Explore: Photosynthesis, what happens when the rate of photosynthesis reaches its maximum?
d. The excess incoming light creates heating. Correct
In View: Origin Life Video, what did Stanley Miller find after waiting a couple of days?
d. The liquid contained organic compounds. Correct
A community plus the nonliving factors and variables which it interacts with is called a(n)
ecosystem
The concept that species have changed over long periods of time is known as
evolution
