Populations and the Environment Answers
The Phoenix area of the Southwestern desert typically receives 8 inches of precipitation yearly, in two seasonal patterns. Even though it is an arid region, it has high biological diversity. Thin-leaf trees abound, such as palo verde and desert ironwoods. Wide varieties of cactus thrive, including the cholla, prickly pear, and saguaro. Wildlife includes insects, reptiles, many bird species, small rodents, and other mammals. Which factor in the Southwestern desert ecosystem is abiotic?
A rock is classified as
Elephants shape their environment in many ways. They can change a forest to a grassy field or dig a hole that might become a pond. They clear large amounts of vegetation, which removes habitats for some organisms but makes the area inviting for other organisms. Which best describes possible interactions of elephants with the surrounding ecosystem?
Many organisms depend on the land as a food source. Seasons can affect the amount of food that is available to these organisms. How would a long, cold winter most likely affect a population of deer?
Hunter is studying for his ecology test. Which fact would least likely show up in his notes?
Which describes the habitat of a frog?
A biologist counts the number of rabbits in a population each year and observes a decrease in population. Since the coyote population has exploded, the biologist concludes that the coyote population has had a negative impact on the rabbit population. Which describes the biologist’s actions?
Which is biotic?
Which best describes a bird’s role as it eats seeds?
Hunter is studying for his ecology test. Which fact would least likely show up in his notes?
Interactions between organisms and their environment impact the organism’s overall population. Zebra mussels are not native North America; they were brought here by ships travelling from Europe. They reproduce quickly and filter out plankton from the water reducing food for native fish. Native fish populations have started to decline. Which concept shows the relationship between zebra mussels and native fish?
Which relationship is shown in the graph?
Which is a biotic factor?
A rock is classified as
A biologist counts the number of rabbits in a population each year and observes a decrease in population. Since the coyote population has exploded, the biologist concludes that the coyote population has had a negative impact on the rabbit population. Which describes the biologist’s actions?
Elephants shape their environment in many ways. They can change a forest to a grassy field or dig a hole that might become a pond. They clear large amounts of vegetation, which removes habitats for some organisms but makes the area inviting for other organisms. Which best describes possible interactions of elephants with the surrounding ecosystem?
Many organisms depend on the land as a food source. Seasons can affect the amount of food that is available to these organisms. How would a long, cold winter most likely affect a population of deer?
Why is a shell considered to be biotic?
What is an organism’s niche?
Which principle states that two species in the same habitat cannot have the same niche?
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