Richness and Abundance

Which two variables must be considered to accurately determine species diversity and compare it across communities?

• growth rates and death rates

• total abundance and habitat type

• genetic diversity and ecosystem diversity

• species richness and relative abundance

Which of the following is TRUE about ecosystem stability?

• It is the ability of an ecosystem to bounce back after a disturbance, which will be higher if biodiversity is lower

• It is the ability of an ecosystem to bounce back after a disturbance, which will be higher if biodiversity is higher

• It is the likelihood that species will go extinct in the ecosystem, which will be higher if biodiversity is lower

• It is the likelihood that species will go extinct in the ecosystem, which will be higher if biodiversity is higher

Tags

NGSS.HS-LS2-6

NGSS.HS-LS4-5

Which of the following is the correct way to calculate relative species abundance (p_i)?

• number of individuals in a species/total individuals in a community

• total individuals in a community/ number of individuals in a species

• species richness/total abundance

• total abundance/ species richness

Tags

NGSS.HS-LS2-1

Which of the following is NOT one of the five main ways that humans are negatively affecting biodiversity?

• habitat loss

• taking antibiotics

• overexploitation

• introducing species into new habitats where they can become invasive

Tags

NGSS.HS-LS2-7

An organism that has a very large impact on their habitat, given their size and/or numbers is a...

• provisioning service

• regulating service

• keystone species

• trophic cascade

Tags

NGSS.MS-LS2-2

Using the information in the image, which of the following is TRUE?

• "A" has greater species diversity because it has higher species richness

• "A" has greater species diversity because it has higher species evenness

• "B" has greater species diversity because it has higher species richness

• "B" has greater species diversity because it has higher species evenness

Tags

NGSS.HS-LS2-2

Which of the following accurately describes the relative abundance (p_i) of ladybugs?

• Their p_i in community A is 3/20 = 0.15

• Their p_i in community B is 4/5 = 0.8

• Their p_i in community A is 3/4 = 0.75

• Their p_i in community B is 20/5 = 4

Tags

NGSS.MS-LS2-1

Aphids feed on plant sap and excrete a sweet-substance (honeydew) as their waste. Ants are often found protecting the aphids from predators and feeding on the honeydew. This is an example of...

• predation

• mutualism

• commensalism

• parasitism

• competition

Tags

NGSS.MS-LS2-2