Bio EOC Bootcamp Ecology

Ecology EOC practice with Ms. Olliff

By Madeline Olliff

Multiple Choice

Shifts in the timing of hibernation, as well as shortening of the length of hibernation periods, have been recorded in a variety of species in response to changes in climate. As global temperatures increase, many animals have been emerging from hibernation earlier than usual.

Which explanation BEST predicts how this environmental change will affect hibernating animals?

• the animals may emerge before they can find the food to survive

• the animals that emerge earlier will have more time to gather resources, so survival will increase

• the animals will probably find ways other than hibernation to conserve energy

• the animals will migrate rather than hibernate, to better meet their needs for resources

Multiple Choice

Snowy egrets are birds that breed in coastal and inland waterways. In the past, hunting the birds for their feathers greatly reduced the snowy egret population. Laws now protect egrets from hunting, and the population has recovered. Today, many wetlands are being drained and filled with rocks and soil so that humans can build on the land.

What is the MOST LIKELY impact of the draining of these wetlands on the snowy egret population?

• the snowy egret will be unaffected because it will adapt to living in dry environments

• the snowy egret's habitat will be reduced, and its population will decrease

• the snowy egret's habitat will not be affected, so its population size will remain the same

• the snowy egret will move to forests, and its population will increase

Multiple Choice

Tropical rainforests have more biodiversity than any other ecosystems. Tropical rainforests also absorb large amounts of carbon dioxide from the atmosphere. Which would be the BEST way to protect these ecosystems?

• design barriers to prevent animals from leaving ecosystems

• develop alternatives to fertilizers for use in agriculture near rain forests

• design filters to keep greenhouse gases out of the atmosphere around rainforests

• develop synthetic alternatives to rainforest products such as teakwood and rosewood

Multiple Choice

Two aquatic ecosystems at two different points in the same river were affected by a sudden change in water temperature. The graph shows how the number of species in each ecosystem changed in response to the in water temperature, and during the months after the change. Which statement BEST compares the responses of these ecosystems to the environmental change?

• ecosystem A recovered better due to higher biodiversity

• ecosystem B had greater stability because it was less diverse

• ecosystem A and B both returned to their original structure and function

• ecosystem B was less affected by change

Multiple Choice

Biologists observed a small island ecosystem. They used their observations to construct the following food web. Which food chain arranges the components of this food web according to energy flow?

• seaweed --> shrimp --> phytoplankton --> mussel

• seaweed --> chiton --> crab --> seagull

• phytoplankton --> mussel --> starfish --> seagull

• seagull --> crab --> chiton --> seaweed

Multiple Choice

Which statement correctly identifies the energy available at various trophic levels in this energy pyramid?

• available energy is highest in the vultures, eagles, lions, and tigers and lowest in the green plants

• available energy is highest in the frogs, spiders, and fish and lower in all other trophic levels

• available energy is lowest in the vultures, eagles, lions, and tigers and highest in the green plants

• the same amount of energy is available to organisms occupying all trophic levels

Multiple Choice

The population size of a species of beetles in a meadow ecosystem is limited by predation by birds. If the bird population in this ecosystem is suddenly reduced by disease, what effect will this most likely have on the population of beetles?

• the beetle population will increase without limit

• the beetle population will decrease and then die out

• the beetle population will increase and then level off

• the beetle population will decrease and then increase

Multiple Choice

DDT accumulates in the fatty tissues of animals and is transferred along food chains. Its concentration increases along each link in the food chain, Which of the following organisms would accumulate the highest concentration of DDT in a given food chain?

• a rabbit (herbivore)

• a field mouse (primary consumer)

• corn (a producer)

• owl (secondary consumer)

Multiple Choice

The major environmental factor limiting the presence of numerous autotrophs at great depths in the ocean is the

• amount of sunlight

• availability of minerals

• dissolved oxygen level

• temperature

Multiple Choice

• materials are cycled between living things only

• materials are cycled between heterotrophic organisms only

• materials are cycled between living and nonliving components of the environment

• materials are cycled between the physical factors of the environment by the processes of condensation and evaporation