Unit 1B Practice Quizizz for Final

Primary consumers eat...

• nothing, because they get their energy from the sun.

• other primary consumers

• primary producers

• everything, because they are also called decomposers

Answer explanation

Primary consumers, such as herbivores, eat primary producers (plants) to obtain energy. They do not get energy from the sun directly, nor do they eat other consumers or decomposers.

Tags

NGSS.MS-LS2-3

Which is the correct definition to describe a biomass pyramid?

• It shows the number of organisms at each trophic level.

• It depicts the flow of energy through each trophic level.

• It represents the biodiversity within an ecosystem.

• It represents total weight of living organisms at each trophic level.

Answer explanation

biomass = total mass of living organisms at each trophic level. Other options don't mention the mass of organisms and instead focuses on numbers or energy flow.

Which is the correct definition to describe a numbers pyramid?

• It shows the number of organisms at each trophic level.

• It depicts the flow of energy through each trophic level.

• It represents the biodiversity within an ecosystem.

• It represents total weight of living organisms at each trophic level.

Answer explanation

"Numbers" here refers to the number of individuals in a population. Ex: 5 rats in the ecosystem feeds 1 owl

In the ecological pyramid shown below, what does the "10%" represent?

• The percentage of energy stored by producers.

• The amount of biomass available to herbivores.

• The total energy lost to the environment at each level.

• The portion of energy transferred to the next trophic level.

Answer explanation

The "10%" represents the portion of energy transferred to the next trophic level, illustrating the energy flow in an ecosystem. Typically, only about 10% of energy is passed from one level to the next, while the rest is lost/used up.

Tags

NGSS.MS-LS2-3

What do we call a series of indirect effects caused by changes in the keystone species population, impacting the whole food chain?

• Trophic Cascade
• Trophic Level
• Carrying Capacity
• Logistic Growth

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which of the following statements best describes a keystone species?

• A species that has the largest population size and preys on a large number of different species in the ecosystem.
• A species that does not significantly affect the structure and function of an ecosystem.
• A species that has a disproportionately large impact on its environment relative to its population size, often influencing the whole ecosystem.
• A species that is the first to colonize a disturbed area and helps in establishing new ecosystems.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

What is the most accurate estimate of the carrying capacity for "Species 5" in this ecosystem, as shown in the graph?

• 0

• 2000

• 2500

• it is not possible to determine the carrying capacity.

Answer explanation

To find the carrying capacity, find where the population size stabilizes around. In this graph, the population curve gets flat around 2000 individuals, suggesting this is the carrying capacity. Other options either underestimate or overestimate this value.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which graph shows an exponential growth curve? Make sure the reasoning is also correct.

• Graph A, because population growth leveling as it reaches maximum capacity.

• Graph A, because it shows a stable population over time.

• Graph B, because population decline due to limited resources.

• Graph B, because it shows rapid and unlimited population growth.

Answer explanation

Graph B shows rapid and unlimited population growth, characteristic of an exponential growth curve. In contrast, Graph A indicates stabilization or decline, which does not represent exponential growth.

A species gives birth to only a few offspring and provides parental care. They have about the same death rate throughout its lifespan, meaning individuals are equally likely to die at any age. What type of survivorship curve is typical for this species?

• Type I
• Type II
• Type III

Tags

NGSS.MS-LS4-4

What is a key characteristic of a Type I survivorship curve?

• Type I species give birth to hundreds, even thousands, of offspring at a time.
• Type I species do NOT care for their offspring when they are born.
• Type I species have a higher death rate when the individual is YOUNG.
• Type I species have a higher death rate when the individual is OLD.