Which one of the following animals is most likely to be a keystone species, based on the food web provided?
(1 point)
Responses
grasshopper
grasshopper
deer
deer
frog
frog
Mouse
grasshopper
Based on the data below, which group of animals are genetically diverse?
# of different type of species in the world
Birds 9,000+
Bears 8
Horses 350+
Whales 90
(1 point)
Responses
horses
horses
birds
birds
bears
bears
whales
birds
The Northern Pacific seastar is a particularly successful invasive species. Which of the following explains why it is so successful in the waters of southeastern Australia, outside of its native environment?(1 point)
Responses
It breeds rapidly and has no predators in this environment.
It breeds rapidly and has no predators in this environment.
It can cling to the bottom of ships and other vessels.
It can cling to the bottom of ships and other vessels.
It is accustomed to a cold climate.
It is accustomed to a cold climate.
It consumes the eggs of the spotted handfish.
It breeds rapidly and has no predators in this environment.
Aside from killing native species, what other negative issue might an invasive species present?(1 point)
Responses
They might provide economic benefit.
They might provide economic benefit.
They might avoid interacting with other organisms.
They might avoid interacting with other organisms.
They might increase the diversity of native species.
They might increase the diversity of native species.
They might introduce other organisms, like viruses and bacteria.
They might introduce other organisms, like viruses and bacteria.
What happens after coral is bleached?(1 point)
Responses
The coral is susceptible to starvation.
The coral is susceptible to starvation.
The coral releases algae into the ocean.
The coral releases algae into the ocean.
The coral produces peroxides.
The coral produces peroxides.
The coral dies immediately.
The coral is susceptible to starvation.
The most biodiverse ecosystem in the world is likely a(1 point)
Responses
coral reef.
coral reef.
tundra.
tundra.
taiga.
taiga.
cold desert.