OL Spring Final Review

Gradual changes in an ecosystem lead to (a)  

• decrease in biodiversity
• increase in biodoversity
• higher rates of disease
• reduction of food supplies

A ​ (a)   would cause the greatest change to an ecosystem.

• volcano
• tornado
• flood
• wild fire

Put the steps of succession in order

• Lichens and moss appear

• Lava flows turning the ground to rock.

• small trees take over

• Ecosystem reaches biodiversity again

• grasses and other plants grow

A mite lives in the base of the eyelashes of people who use mascara. It feeds on the mascara; it does not seem to harm people. What type of symbiotic relationship is this? (a)  

• mutualism
• commensalism
• parasitism
• predation

What type of symbiosis? (a)  

• Commensalism
• Parasitism
• Mutualism

Which organism occupies multiple trophic levels?

• berries

• butterfly

• frog

This diagram shows how energy flows through an eco-system. What is the first source of energy in this pyramid?

• sharks and large birds

• algae, plankton and seagrass

• herbivorous fish, crustaceans and sea urchins

• seals and carnivorous fish

In an ecological pyramid, which type of organism always has the least amount of energy available?

• Producers
• Herbivores
• Carnivores
• Top Predator

What characteristic distinguishes amphibians from birds and reptiles?

• Amniotic egg

• Egg shells

• Vertebrae

• Hair/fur

Archaebacteria's key characteristic is that they

• are eukaryotic

• live in extreme environments

• are non-living

• live in the soil