Affiliate Marketing Secrets

1. Which of the following are biotic factors and which are abiotic factors? (1 point)
Rain and grass are biotic; wind and humidity are abiotic.
Algae and fungi are biotic; temperature and rainfall are abiotic.
Oxygen and sunlight are biotic; maple trees and spiders are abiotic.
Fish and whales are biotic; plankton and bacteria are abiotic.
2. Why is it useful for an ecologist to identify the keystone species in an ecosystem? (1 point)
The keystone species is only important in early stages of succession, and so the ecologist can safely ignore changes in its population at later stages.
The keystone species is the most susceptible to pollution, and so its numbers give an indication of the levels of pollutants in an area.
The keystone species is critical to maintaining the stability of an ecosystem, and changes in its population indicate changes in ecosystem health.
The keystone species is important for the cycling of matter and must be maintained or the biogeochemical cycles will be affected.
3. Competition over resources occurs between organisms (1 point)
participating in an herbivorous relationship.
forming a symbiotic relationship.
attempting to occupy the same niche.
initiating primary succession after a disturbance.
4. The lowest trophic level in an ecosystem (1 point)
has the lowest quantity of stored energy.
has the greatest biomass.
is made up of heterotrophs.
contains detritovores.
5. What is true of the energy that is passed from one trophic level to the next in a food chain? (1 point)
About 10% of the energy passed from one level to the next is released as heat.
About 10% of the stored energy of one level becomes stored energy at the next higher level.
The energy at each level increases by about 10% with each move up in trophic level.
The total energy at all trophic levels is constant, but only about 10% is available for use by organisms for life functions.
6. Autotroph is to producer as heterotroph is (1 point)
herbivore.
consumer.
decomposer.
carnivore.
7. Which of the following is true of population cycles? (1 point)
Population cycles signal an imbalance in an ecosystem.
Keystone species are necessary to establish population cycles.
A new species introduced to an ecosystem tends to stabilize population cycles in the ecosystem.
Population cycling helps maintain a healthy ecosystem.
8. An example of a pioneer species is (1 point)
a sparrow.
a lichen.
an earthworm.
a spider.
9. Why are human disturbances often of more concern than natural disturbances? (1 point)
Human disturbances last much longer than natural disturbances so that a damaged ecosystem may have little or no chance of recovery.
Human disturbances are stronger than natural disturbances and so the recovery needed is much greater.
Human disturbances often cover much wider areas than natural disturbances, which means that more ecosystems are affected.
Human disturbances affect all types of ecosystems, whereas natural disturbances are limited to certain types of ecosystems.
10. Suppose a particular community is concerned about a fox population that kills and eats chickens on the local farms. What is the best course of action by this community? (1 point)
Kill the foxes.
Trap and transport the foxes out of the region.
Introduce rabbits as an alternative source of food for the foxes.
Build enclosures for the chickens that the foxes cannot access.

I would like to know what the Komodo Dragon’s Niche is. It’s part of my ecology project and I haven’t found much on what its niche (The ecological role and space that an organism fills in an ecosystem) would be. If you could either go into as much detail as possible or provide a link to a website I would really appreciate it! Thanks!

In a pond, there are so many different places…
There are niches right at the water’s edge.
There are different ones, just a few feet deeper into the water.
Then there are other niches very deep in the water, and others deep in the soil at the bottom of the pond.
There are niches associated with algae growing underwater and others growing on plants floating in the water.
There could be shady parts of the pond vs sunnier parts, where organisms that prefer one or the other prefer to grow.
If the pond is large enough, it might have an island, effecting creating a barrier from the rest of the shoreline and possibly a very specialized niche…

A) pyramid of biomass
B) pyramid of numbers
C) pyramid of energy
D) niche

I only have two, that I need.
Increasing the biodiversity of an ecosystem may result in more niches.
Diseases are more likely to spread in an ecosystem with high biodiversity than in an ecosystem with low biodiversity

The two laws of thermodynamics can explain an important concept knows as
Unlimited factors.
Limiting factors.
Negative factors.
Positive factors.
The larger number of habitats and niches in the ecosystem, the greater the conditions for ___________________.
decomposers
maximum diversity
minimum diversity
abiotic factors
In many developing countries, the amount of ________ is high, as it exceeds internationally recognized standards.
Global warming.
Ozone depletion.
Air pollution.
None of the above.
When a forest is cut down and new community of houses is built, a loss in biodiversity may result.
True
False