Random
What you would call an ecological symbiotic relationship between two organisms where one benefits, but the other is not helped or harmed?
commensalism
The smallest unit of life that can sustain itself is called...
organism
The direction of the flow of energy in a food web is represented by ___.
arrows
one species benefits, the other is harmed
parasitism
a set of organisms in which the members have similar characteristics to each other and can breed with each other
species
Grizzly bears eat seeds, berries, roots, grasses, fungi, deer, elk, fish, and insects. This would make them a(n)...
Omnivore
What are the ecological levels of organization from smallest to the largest?
organism, population, community, ecosystem, biome, biosphere
What does a food web represent?
All connections of energy flow throughout all organisms in a ecosystem.
In the tropical regions of Africa, the crocodile lies with its mouth open. The plover flies into its mouth and feeds on bits of decaying meat stuck in the crocodile’s teeth. The crocodile does not eat the plover. Instead, he appreciates the dental work. The plover eats a meal and the crocodile gets his teeth cleaned. This is an example of
mutualism
biodiversity
the variety of living organisms in an ecosystem
Hawks and brown bears live together in the same habitat. There will be competition between the hawks and the brown bears only if which of the following is true?
Both brown bears and hawks feed on the same species of fish.
Andrea is on the girl's cross country team. She is heading out for a run when she comes across 20 Canadian geese. What level of organization is this group of Canadian geese?
population
The top predator in a food web will _______________
A. Always be affected by changes in the populations of organisms below it
B. Never be affected by changes in the populations of organisms below it
C. Sometimes be affected by changes in the populations of organisms below it
A. Always be affected by changes in the populations of organisms below it
Field mice eat corn. Which would most likely happen if the field mouse population grew?
There would be less corn due to the mice eating it.
a diagram that represents the energy found within the trophic levels of an ecosystem
energy pyramid
Which organism receives the least amount of energy from the producer?
Predator
Abby is walking to school with her best friend Jaylyn. They begin talking about everything they see including the ash trees, grass, weeds, ants, and people. They also how there are several large puffy clouds out, and how the sun is just starting to come up. What level of organization are they discussing?
ecosystem
Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?
There would be a decrease in the grass/flowers population.
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.
the change in the structure of a community of different species over time
ecological succession
When a population grows past the ecosystem's carrying capacity, what happens to the population?
The population starts to die off to return to carrying capacity
Jacob is going out to his grandparent's farm. On the farm is a stream that he likes to fish at. When he is fishing he sees many different species of fish as well as maple and oak trees and dragonflies. What Jacob is seeing is an example of what level of organization?
community
In Australia the farmers had a problem with beetles eating the sugar cane. So they introduced the cane toad to control that population. Instead of eating the beetles, they ate the source of food and other organisms. What would be a possible consequence of this?
The food web was changed by this one organism
Hawks and owls eat the same type of food and struggle with one another to get their food. What is this an example of?
Competition
the position species occupies in a food chain or web based on what it eats and what eats it
trophic level