A) Which major environmental change is occurring today that could cause the next mass
extinction? (1 point)
oil spills
deforestation
extreme weather events
climate change
9 answers
climate change
A) What is the difference between a mass extinction and a regular (background) extinction?
(1 point)
Mass extinction can be caused by ecological factors like climate change and loss of habitat.
Mass extinction involves many species over a short period of geologic time.
Mass extinction occurs over a long period of time.
Mass extinction is ongoing and is a regular process that results from evolution.
(1 point)
Mass extinction can be caused by ecological factors like climate change and loss of habitat.
Mass extinction involves many species over a short period of geologic time.
Mass extinction occurs over a long period of time.
Mass extinction is ongoing and is a regular process that results from evolution.
Mass extinction involves many species over a short period of geologic time.
A) After the K-Pg mass extinction event, mammals were able to survive and proliferate. Which
of the following factors contributed to this success the least? (1 point)
fewer predators in the absence of dinosaurs.
most mammals being nocturnal, allowing them to see better in the darkened conditions.
ability to regulate their body temperature in the face of reduced sunlight and colder temperatures.
more oceanic and lake habitat, leading to marine mammal evolution.
of the following factors contributed to this success the least? (1 point)
fewer predators in the absence of dinosaurs.
most mammals being nocturnal, allowing them to see better in the darkened conditions.
ability to regulate their body temperature in the face of reduced sunlight and colder temperatures.
more oceanic and lake habitat, leading to marine mammal evolution.
more oceanic and lake habitat, leading to marine mammal evolution.
A) How is climate change today similar to the major K-Pg extinction event that ended the reign
of the dinosaurs? (1 point)
New species are emerging in the absence of extinct species.
Individuals that can’t adapt are dying, and species are going extinct.
The environment is changing rapidly, and new ecosystems are forming, causing mass
extinctions.
Catastrophic weather events are occurring that are wiping out entire ecosystems
of the dinosaurs? (1 point)
New species are emerging in the absence of extinct species.
Individuals that can’t adapt are dying, and species are going extinct.
The environment is changing rapidly, and new ecosystems are forming, causing mass
extinctions.
Catastrophic weather events are occurring that are wiping out entire ecosystems
The environment is changing rapidly, and new ecosystems are forming, causing mass extinctions.
A) Fossils provide evidence that best helps scientists determine changes over time in (1 point)
the emergence or extinction of species.
the number of species in an environment.
the environment.
the number of individuals in each species
the emergence or extinction of species.
the number of species in an environment.
the environment.
the number of individuals in each species
the emergence or extinction of species.
13 answers