Keystone Biology Evolution

During a school trip to Florida, Alondra and Carl learned that the Gopher Tortoise creates burrows that become beneficial habitats for many other species, making it...

• an Invasive Species

• an Indicator Species

• a Non-native Species

• a Keystone Species

Matthew and Alondra are studying the roles of native species and invasive species in Florida's ecosystems. How do they differ in their contributions to ecological balance?

• Native species disrupt the ecosystem, while invasive species maintain balance

• Both contribute equally to maintaining ecological balance

• Native species maintain balance, while invasive species disrupt it

• Invasive species are more beneficial than native species

Tags

NGSS.MS-LS2-4

If an ecosystem lost a keystone species, which outcome would be expected?

• A new keystone species would replace the old keystone species.

• The oxygen supply in the ecosystem would be depleted.

• The population numbers of other species would change dramatically.

• The temperature of the ecosystem would increase.

Tags

NGSS.MS-LS2-4

Which characteristic is shared by all prokaryotes and eukaryotes?

• Ability to store hereditary information

• Use of organelles to control cell processes

• Use of cellular respiration for energy release

• Ability to move in response to environmental stimuli

Which characteristic is shared by all prokaryotic and eukaryotic organisms?

• the ability to reproduce asexually

• the ability to make their own food

• the need for a source of energy

• the need for oxygen for respiration

A scientist puts 100 houseflies in a sealed container; then sprays an insecticide into the container.  Ninety-six of the flies die.  Four survive.  The scientist lets the survivors mate and produce offspring, then repeats the experiment with 100 offspring.  Fifty-six of them survive the spray.  This experimental result is evidence of – 

• adaptive radiation 

• speciation

• natural selection

• extinction

Tags

NGSS.MS-LS4-4

What genetic change allows organisms to survive natural selection in their environments? 

• learned behavior

• acquired traits

• analogies

• adaptations

Tags

NGSS.MS-LS4-4

Which of the following best describes a keystone species in an ecosystem?

• A species that is the most abundant in the ecosystem

• A species that has a disproportionately large impact on its environment relative to its abundance

• A species that is the primary producer in the ecosystem

• A species that is the top predator in the ecosystem

Tags

NGSS.MS-LS2-5

In the context of evolution, what is the significance of a keystone species?

• They are the first to adapt to environmental changes

• They help maintain the structure and integrity of the ecosystem

• They are the most genetically diverse species

• They are the fastest to reproduce

Tags

NGSS.MS-LS2-2

Which of the following is an example of a keystone species?

• A large population of deer in a forest

• A small population of wolves in Yellowstone National Park

• A dominant tree species in a rainforest

• A common grass species in a savanna

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

NGSS.MS-LS2-5