Most of the world's fresh water supply is used for
drinking water for livestock.
drinking water by humans.
irrigating crops.
boating and recreation.
bathing by humans.
Habitat destruction is the largest cause of the loss in biodiversity worldwide.
True/False?
Preserving biodiversity can increase the value of land and of the resources extracted from it.
True/False?
In which of the following areas is human population growth the lowest?
Africa
South America
Middle East
Australia
Europe
In which of the following would the population size remain the same?
A government policy that limits the number of children per family.
A couple has only 1 child.
A couple has no children but each has two siblings.
Each couple has only 2 children.
A couple with 4 children
Which of the following is true about the current state of human population growth?
The doubling-time for the human population is increasing.
The current global death rate exceeds the current global birth rate.
During the 20th century, global human population growth has been high.
After the Industrial Revolution, population growth increased.
Human populations tend to be evenly distributed.
An organism is very large and has few young. This organism is most likely to
live in large groups.
give very little care to its offspring.
develop very quickly.
be long-lived.
eat its mate.
All of the following are true about ecosystems EXCEPT
energy is constantly recycled.
chemicals are constantly recycled and reused.
the ultimate source of energy is the sun.
energy is required continuously because some energy is lost.
chemicals are converted from one form to another.
In an aquatic ecosystem, the aquatic plants are eaten by small invertebrates that in turn are eaten by crayfish, the crayfish are eaten by fish, and the fish are eaten by ducks. In this system, the most biomass would be found in the _____________.
aquatic plants
ducks
small invertebrates
crayfish
fish
A decomposer obtains its food from
parasitizing living organisms.
mushrooms.
sunlight.
preying on other living organism.
dead and decaying plant matter.
Deforestation may contribute towards climate change because
it leads to habitat loss for many forest species, which invade nearby marginal habitats, including those used by humans.
it leads to salinization of the land.
loss of trees disrupts the carbon cycle, limiting the amount that is absorbed by plants, and increasing the concentration of carbon dioxide in the atmosphere.
the trees naturally trap heat near the Earth's surface, and the loss of trees allows this heat to escape into space through the atmosphere.
the forest canopy reflects some solar radiation back into space, allowing more of it to penetrate to the Earth's surface
Quick Reply
