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
bears
bears
whales
whales
horses
horses
birds
birds
Which biome best supports animals that feed mostly by grazing on grasses and small shrubs?(1 point)
Responses
mixed forests
mixed forests
tropics
tropics
savanna
savanna
polar desert
savanna
Which describes a primary role of the pioneer species in an ecosystem?(1 point)
Responses
protect other species from danger
protect other species from danger
provide food for small animals
provide food for small animals
prevent fertile soil from washing away
prevent fertile soil from washing away
What happens after coral is bleached?(1 point)
Responses
The coral dies immediately.
The coral dies immediately.
The coral produces peroxides.
The coral produces peroxides.
The coral is susceptible to starvation.
The coral is susceptible to starvation.
The most biodiverse ecosystem in the world is likely a(1 point)
Responses
coral reef.
coral reef.
cold desert.
cold desert.
tundra.
tundra.
taiga
coral reef
Marine biologist Dr. James Estes researched sea otters and their habitats in the Aleutian Islands of the North Pacific Ocean. Sea otters feed on animals such as crabs and urchins. Islands with sea otters contained a lot of kelp, a seaweed that is an important food source for fish and other sea animals. However, Islands without otters had large populations of urchins but no kelp since sea urchins feed on this seaweed. Since sea otters are able to control the population of urchins, this allows for kelp to freely grow in those areas. Given this information, what term best describes the otter in the Aleutian Islands ecosystem?(1 point)
Responses
decomposer
decomposer
producer
producer
keystone species
keystone species
apex predator
keystone species
Dolphins are animals that live in water, but they do not have gills. What might this suggest about dolphins?(1 point)
Responses
They do not need to release carbon dioxide.
They do not need to release carbon dioxide.
They do not need oxygen.
They do not need oxygen.
They have another structure to obtain oxygen.
They have another structure to obtain oxygen.
They make their own food.
They have another structure to obtain oxygen.
Why is fever an effective response to pathogens?(1 point)
Responses
It can signal the body to fight.
It can signal the body to fight.
It can inactivate pathogens in the body.
It can inactivate pathogens in the body.
It can remove pathogens from the body.
It can inactivate pathogens in the body.
Biodiversity Unit Test
1 of 13 1 of 13 Items
Question
Use the image to answer the question below.
The plants are eaten by consumers at the first level, such as rat, grasshopper, frog, squirrel, whiptail, and deer. The consumers at the second level, such as ringtail, eagle, and pine marten eat the consumers at the first level. The consumers at the third level, such as wolf, mountain lion, and cat eat the consumers at the second level. Some of the consumers at the first level are also eaten by consumers at the third level.
Which one of the following animals is most likely to be a keystone species, based on the food web provided?
(1 point)
Responses
deer
deer
grasshopper
grasshopper
Mouse
Mouse
frog