Biology Exam #2

Bees are a colonial species and live in hives with thousands of other bees. Which description is an example of commensalism?

A bee hive in a hollow tree

Which species is NOT likely to be considered a keystone species?

A fish species that specializes in eating only a few aquatic plant species and that does not form a...

Which example does NOT describe a predation event?

A producer creates energy from the sunlight

Which phrase does NOT describe a keystone species?

A species that always occupies the highest trophic level in a community

Which of the following is a density-dependent factor?

A viral disease

An ecosystem ecologist might study...

All of the answers (herbivores, precipitation impact, predators, plant populations)

What do fungi and arthropods have in common?

All of the species in both groups have chitin in their structures

Which of the following defense/predator avoidance features or strategies can be found in arthropods?

All of the strategies can be found in arthropods (secondary metabolites, exoskeleton, venom, flight)

Which of the choices does NOT describe an area that usually has a biologically diverse ecosystem?

An area with a highly fragmented landscape

Which of the following would cause a population to grow?

An increase in the birth rate and a decrease in the death rate

A bear that eats both blueberries and fish from a river is

An omnivore, heterotroph, and consumer

Which group of plants lack roots, seeds, and a vascular system?

Bryophytes

Which of the following is NOT a characteristic found in at least some organisms in the domain Eukarya?

Cells lacking a nucleus

Which of the following is NOT a feature of all animals?

Defined body symmetry

Which statement best explains why herbivorous organisms are more energetically efficient than those that consume meat?

Herbivorous organisms that are at the bottom of the food chain

Which description is an example of the effects of rising temperatures?

Plants are blooming earlier in the year

Starting with the group that evolved earliest to the group that evolved most recently, which of these sequences is in the correct order?

Protists, bryophytes, insects

What type of symmetry does a sand dollar have?

Radial

Removing the mussels or barnacles from a specific community doesn't cause any substantial changes within it, but removing the starfish drastically changes the mix of species in the area. Which is the keystone species?

Starfish

Which phrase is NOT a biotic factor affecting population growth of moose on Isle Royale?

Summer temperature

Plants like maple trees ___________________ CO2 by ____________________

Take up; photosynthesis

Growth rates are __________________

The difference between birth and death rates in a population

Which of the following statements describes an example of population growth?

The number of people in a town has increased by 25% in the past 5 years

A major difference between a fern and a moss is...

The presence of a vascular system

What do mosquitos, snails, and earthworms all have in common?

They are all invertebrates

In relation to a food chain, what do plants and photosynthetic algae have in common?

They are both producers

What do all members of the informal group known as protists have in common?

They are eukaryotic

What are two major plant adaptations that were most important in allowing plants to become independent of aquatic habitats?

Vascular systems and seeds

Competition is most likely to occur....

When two species occupy overlapping niches

Which insect adaptation is thought to have had the greatest influence on the diversity of this group?

Wings