Which of the following describes a population?(1 point)
Responses
rain falling on flowers and rocks in a garden
rain falling on flowers and rocks in a garden
a bird flying through the trees to its nest
a bird flying through the trees to its nest
all of the barnacles living on a large rock
all of the barnacles living on a large rock
elephants and zebras foraging for food at the same time
all of the barnacles living on a large rock
Three bird species share a habitat. Bird A eats insects and plant seeds. Bird B drinks flower nectar. Bird C eats plant seeds.
A drought occurs in their habitat, and that season’s plants are wiped out entirely. What is the likely outcome for each type of bird?
(1 point)
Responses
Bird A survives; either bird B or bird C dies, and the other survives.
Bird A survives; either bird B or bird C dies, and the other survives.
Bird B survives; both birds A and C die.
Bird B survives; both birds A and C die.
Bird B survives; either bird A or bird C dies, and the other survives.
Bird B survives; either bird A or bird C dies, and the other survives.
Bird A survives; both birds B and C die.
Bird A survives; both birds B and C die.
Bird A is the only one that has a chance of surviving, as it can eat both insects and plant seeds. Bird B and C are both restricted to only one food source, so if that source is wiped out, they will not survive. Therefore, either bird B or bird C will die, and the other will not survive either. The outcome depends on which bird species has a larger population and is able to find other sources of food. So, the likely outcome is that Bird A survives; either bird B or bird C dies, and the other survives.
Which of the following describes a population?(1 point)
Responses
rain falling on flowers and rocks in a garden
rain falling on flowers and rocks in a garden
elephants and zebras foraging for food at the same time
elephants and zebras foraging for food at the same time
a bird flying through the trees to its nest
a bird flying through the trees to its nest
all of the barnacles living on a large rock
all of the barnacles living on a large rock
Three bird species share a habitat. Bird A eats insects and plant seeds. Bird B drinks flower nectar. Bird C eats plant seeds.
A drought occurs in their habitat, and that season’s plants are wiped out entirely. What is the likely outcome for each type of bird?
(1 point)
Responses
Bird B survives; either bird A or bird C dies, and the other survives.
Bird B survives; either bird A or bird C dies, and the other survives.
Bird A survives; either bird B or bird C dies, and the other survives.
Bird A survives; either bird B or bird C dies, and the other survives.
Bird B survives; both birds A and C die.
Bird B survives; both birds A and C die.
Bird A survives; both birds B and C die.
Bird A survives; both birds B and C die.
Bird A survives; either bird B or bird C dies, and the other survives.
An increase in which of the following could increase the long-billed curlew population?(1 point)
Responses
forest habitats
forest habitats
milkweed
milkweed
grassland habitats
grassland habitats
pesticide use
pesticide use
grassland habitats
Long-billed curlews eat many different kinds of insects, including grasshoppers, as a source of food. It has been shown that pesticide use kills many of these insects. How would you expect an increase in pesticide use to affect to the population of long-billed curlews in the same area?(1 point)
Responses
It would increase.
It would increase.
It would decrease.
It would decrease.
It would stay the same.
It would stay the same.
It would not be affected.
It would not be affected.
It would decrease.
How might bird populations on mountainsides respond to a warming climate?(1 point)
Responses
Their eggs will hatch later.
Their eggs will hatch later.
The range shifts uphill over generations.
The range shifts uphill over generations.,
There is not likely to be an effect based on a warming climate.
There is not likely to be an effect based on a warming climate.
The range shifts downhill over generations.
The range shifts downhill over generations.
The range shifts uphill over generations.
What happened to North American coastal waters when the great white shark population decreased?(1 point)
Responses
The ray population increased.
The ray population increased.
The scallop population increased.
The scallop population increased.
The oyster population increased.
The oyster population increased.
The clam population increased.
The ray population increased.
Which organism is most responsible for the decrease in the great white shark population?(1 point)
Responses
humans
humans
rays
rays
scallops
scallops
oysters
oysters
humans
Climate change is primarily driven by(1 point)
Responses
photosynthesis.
photosynthesis.
deforestation.
deforestation.
mining.
mining.
fossil fuel burning.
fossil fuel burning.
fossil fuel burning.
Hunting can be used to combat(1 point)
Responses
pollution.
pollution.
climate change.
climate change.
invasive species.
invasive species.
deforestation.
deforestation.
invasive species.
Fertilizer from agriculture flows into the ocean. What organism may directly benefit from this runoff?(1 point)
Responses
oysters
oysters
algae
algae
dolphins
dolphins
fish
fish
algae
Emperor penguins breed on shelves of sea ice in the winter. By spring, the chicks have developed waterproof plumage and are ready to swim in the cold ocean waters. What effect might a warming climate have on the penguins? (1 point)
Responses
The sea ice melts before the chicks are ready to swim.
The sea ice melts before the chicks are ready to swim.
The chicks grow faster because of the warming temperature.
The chicks grow faster because of the warming temperature.
The sea ice melts later in the season, and the penguins have to travel farther to find food.
The sea ice melts later in the season, and the penguins have to travel farther to find food.
The sea ice freezes earlier in the winter, shifting the breeding schedule.