Polar bears hunt for ringed seals by waiting for them to emerge from breathing holes in the ice. Which abiotic change may decrease a polar bear’s ability to hunt?(1 point)
Responses
increased temperatures
increased temperatures
increased ice cover
increased ice cover
increased competition
increased competition
increased seal population
increased temperatures
Ringed seals give birth in lairs carved out of packed snowdrifts. Which abiotic change may increase pup mortality?(1 point)
Responses
reduced polar bear population
reduced polar bear population
reduced temperatures
reduced temperatures
reduced carbon dioxide
reduced carbon dioxide
reduced snowfall
reduced snowfall
Which component of a marine ecosystem is abiotic?(1 point)
Responses
dolphin
dolphin
algae
algae
water
water
shark
water
Climate change has increased the mean temperature in central Europe. How might bird populations respond to this change?(1 point)
Responses
lay more eggs
lay more eggs
move their range south
move their range south
change their diet
change their diet
move their range north
move their range north
What two factors are negatively affecting coral reefs due to climate change?(1 point)
Responses
Higher ocean temperatures and more acidic waters
Higher ocean temperatures and more acidic waters
Higher ocean temperatures and less acidic waters
Higher ocean temperatures and less acidic waters
Lower ocean temperatures and more acidic waters
Lower ocean temperatures and more acidic waters
Lower ocean temperatures and less acidic waters