FREE ECOLOGY AND STUDY GAMES ABOUT SCIENCE

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FREE ECOLOGY AND STUDY GAMES ABOUT SCIENCE

OLYMPIAD ECO EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -18 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Primary Consumer

Answer:

They are carnivores (meat-eaters) and omnivores (animals that eat both animals and plants)

Question 2: Biodiversity

Answer:

The number and variety of organisms within one region (biome)

Question 3: Stabilizing Selection

Answer:

favors the average individuals in a population. This process selects against the extreme phenotypes and instead favors the majority of the population that is well adapted to the environment

Question 4: Primary

Answer:

The ecological succession of vegetation that occurs in passing from barren earth or water to a climax community

Question 5: Secondary

Answer:

The development of biotic communities in an area where the natural vegetation has been removed or destroyed but where soil is present

Question 6: Extinction

Answer:

No remaining living organisms; gone forever

Question 7: Selection

Answer:

A process in which environmental or genetic influences determine which types of organism thrive better than others, regarded as a factor in evolution

Question 8: Directional

Answer:

favors one extreme phenotype over the mean or other extreme. This phenomena is usually seen in environments that have changed over time. Changes in weather, climate, or food availability lead to__

Question 9: Disruptive Selection

Answer:

Selects against the average individual in a population. The make up of this type of population would show phenotypes of both extremes, but have very few individuals in the middle.

Question 10: Limiting Factors

Answer:

A factor that limits a population's growth; i.e. resources, shelter, food and disease

Question 11: Sucession

Answer:

The replacement of one community by another, developing toward a climax

Question 12: Secondary Consumer

Answer:

herbivores (plant-eaters)

Question 13: Tertiary Consumer

Answer:

A carnivore at the topmost level in a food chain that feeds on other carnivores; an animal that feeds only on secondary consumers.

Question 14: Mutualism

Answer:

symbiosis that is beneficial to both organisms involved.

Question 15: Decomposer

Answer:

an organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material.

Question 16: Natural Selection

Answer:

The process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution.

Question 17: Artificial

Answer:

The process in which breeders choose the variants to be used to produce succeeding generations

Question 18: Primary Producer

Answer:

Organisms in an ecosystem that produce biomass from inorganic compounds (autotrophs). In almost all cases these are photosynthetically active organisms (plants, cyanobacteria and a number of other unicellular organisms; see article on photosynthesis)