Living Systems ReviewFebruary 5

All of the following are examples of living things interacting with each other EXCEPT —A. birds preying on insects living in the grassB. squirrels spreading the seeds of trees by burying themC. fish eating plants and other smaller fishD. frogs sleeping in the mud at the bottom of the pond

Plants interact with living and non-living components in their environment. Which is an interaction with a non-living element?

A. Small insects eating the stems of the plantsB. Humans breathing oxygen released by plantsC. Bees gathering pollen from flowers of plantsD. Sandy soil holding the roots of the plants

What habitat change might be harmful for a Pacman frog?

A. Heavy rains in the afternoons over a period of daysB. An increase in population of several kinds of birdsC. The introduction of a new species that eats rodentsD. A change in weather, leading to cooler temperatures

Pacman frogs live in South America. Some of their traits are listed here.

Which adaptation of a cactus is related to its interactions with living organisms in its environment?A. roots that grow deep underground to reach waterB. large, expendable stem that allows it to store waterC. a waxy, outer coating to prevent the loss of the waterD. spines to protect it from animals that want its water

Which of the following is a question that could be asked in a scientific investigation of how organisms depend on their environment?

A. How does temperature affect the formation of soil?B. What time of day produces the most precipitation?C. What effect would a drought have on a prairie ecosystem?D. How fast does water erode different types of rock?