7.10 ABC Review

The picture shows a river in a desert environment.Which quality of this river plays the largest role in allowing for the abundant vegetative plant growth along the river's bank?

• The river maintains a significantly lower temperature than the rest of desert.

• The river attracts animals that feed on grasses and shrubs along the river.

• The river provides the moisture required for plant growth in an arid environment

• The river erodes sediments that get in the way of root growth down the river.

The picture shows cacti growing in a desert environment.

Which of the following is NOT a way that a desert environment supports populations of cacti?

• It has fewer plant-eating organisms than other environments.

• It has a lot of sunlight for the cacti to photosynthesize during the day.

• It has loose, sandy soil for cacti to bury their shallow roots in easily.

• It has little rainfall throughout the year.

The picture shows a mangrove estuary environment.

Which of the following is a quality of the mangrove estuary environment that allows small fish and crustaceans to live there?

• It provides shelter and protection from predators for small animals.

• It has a fast-moving current and waves running through it.

• t has a higher salt content than ocean water.

• has lower-than-normal oxygen levels because of the mangrove trees.

The food webs model relationships among the organisms in two ecosystems.

Which ecosystem would be more likely to survive if a disease killed the grasses?

• The forest ecosystem, because most of the animals can eat other organisms.

• The grassland ecosystem, because several predators compete for food.

• The forest ecosystem, because it has three top predators.

• The grassland ecosystem, because it has many herbivores.

The figure above shows the same ecosystem in Texas at two different times.

Which of the following MOST likely caused the change of species shown in the figure?

• development of a parking lot

• passing through of a glacier

• preservation of habitat

• occurrence of a forest fire

Which of these types of environments is MOST LIKELY to

experience the arrival of pioneer species?

• an old growth forest

• an undisturbed prairie

• an established mountain lake

• a newly formed volcanic island

Which of the following would most likely be true about ecosystems where factors such as light and water are not restrictive?

• The ecosystem will contain an abundance of all the same type

  of producers.

• The ecosystem will have a hard time sustaining any consumers.

• The ecosystem will contain too many consumers.

• The ecosystem will contain an abundance of a variety of producers.

Clownfish, sea anemone, coral, sea urchins, sponges, and parrot fish are just a few examples of the large variety of organisms that can be found in a coral reef. The coral reef and its inhabitants are suffering due to several factors such as pollution, coastal development, sedimentation and destructive fishing practices.

What would be the most likely result if some of the species in the coral reef are destroyed?

• Other organisms would move into the coral reef area.

• The coral reef would be allowed to flourish without so many fish and plants living in and around it.

• The coral reef would begin to deteriorate without the variety of fish and plants necessary to maintain balance.

• The coral reef would begin to deteriorate without the variety of fish and plants necessary to maintain balance.

Directions: The tables show the number of species and organisms in four different ecosystems. Use the tables to answer any questions that follow.

• Ecosystem Q

• Ecosystem R

• Ecosystem S

• Ecosystem T

Based on the table, which of the following is most likely true?

• Ecosystem Q will sustain itself longer than Ecosystem T, because Ecosystem Q has the least amount of organisms to support.

• Ecosystem R will sustain itself longer than Ecosystem T, because Ecosystem R has a more even distribution of organisms.

• Ecosystem S will sustain itself longer than Ecosystem R, because Ecosystem S has more organisms in total.

• Ecosystem T will sustain itself longer than Ecosystem Q, because Ecosystem T has a more dominant species in its environment