Organism Interactions in Ecosystems
An increase in the population of an organism would most likely be associated with which of the following?
An expansion of suitable living space.
Certain bacteria live and grow on the roots of some plants, and produce chemicals that are beneficial to the plants. Which of the following observations best supports the claim that this relationship is beneficial to the plants?
Plants with a higher density of the bacteria on their roots have increased rates of survival and reproduction.
Matter is passed from the living part of an ecosystem to the non-living part when which of the following takes place?
Plants decompose
An increase in which of the following factors is likely to contribute to competition between two members of the same species living in a certain habitat?
Population of the species
non-living items
What data would be most helpful to support the claim that the population of a certain plant is dependent on the rainfall in its habitat?
Rainfall amounts and number of these plants in a certain habitat over several years
Sharks consume (eat) smaller fish they catch in the ocean. Frogs catch and eat flying insects in ponds. What type of relationship is this?
Predation
The energy organisms need to live and grow first enters the ecosystem when –
plants take in light energy from the Sun.
Eagles and grizzly bears live together in the same habitat. There will be competition between the eagles and the grizzly bears only if which of the following is true?
Both grizzly bears and eagles feed on the same species of salmon.
Name something that is biotic.
living items.
What biotic factor is directly necessary for the survival of a lion in its habitat?
Zebra
A ________________ is the natural home or environment of a plant, animal, or other organism.
Habitat
Food webs and food chains demonstrate...
the pathways for the flow of food energy in an ecosystem
A student wants to investigate competition between two organisms. FOr the investigation, it is most important that the student should choose organisms that .....
require the same resources.
Who was the first president of The United States of America?
George Washington
Termites are insects that may sometimes live in mounds, and eat plants, including trees and grass. How do the termites depend on the trees and grass in their habitat?
Food Source
This occurs when niches overlap between species and they have to compete for resources.
Competition
What happens to energy as it moves from a producer to the top consumer?
Most of the energy is lost, in fact each organism only gets 10% of it's energy
A food web diagram is provided. Bases on the diagram, it is reasonable to conclude that matter could follow which of the following paths as it cycles through this ecosystem?
Grass - deer - mountain Lion
What city does Mrs. Eubanks live?
Ewing
The milkweed plant serves an important role in the life cycle of the monarch butterfly. Adult monarchs lay their eggs on milkweed, and then caterpillars eat that same plant during their development. Based on the relationship between monarchs and milkweed, which of the following trends would be predicted when looking at data on the populations of these two organisms?
Population decrease in monarch butterflies should follow after a population decrease in milkweed.
Which of the following describes a symbiotic relationship?
Shark and remora fish
What do the arrows in food chains and food webs represent?
The arrows point in the direction the energy flows.
The energy organisms need to live and grow first enters the ecosystem when -
Plants take in light energy from the sun.
Who was the 14th president of The United States of America?
Franklin Pierce