Ecology Mock Test

Competition occurs when-

• Organisms rely on the same resources for survival

• all populations in an ecosystem occupy different niches

• resources are abundant and population density is low

Tags

NGSS.MS-LS2-1

Tapeworms are organisms that live inside the intestines of animals like pigs and take nutrients away from the pigs. In this relationship, what does the tapeworm represent?

• The tapeworm is prey

• The tapeworm is a parasite

• The tapeworm is a consumer

Tags

NGSS.MS-LS2-3

Barnacles have attached themselves to the skin of a whale that lives in the arctic. In this relationship, the barnacles derive benefit. There is no benefit or harm to the whale. What do we call the relationship that exists between the whale and the barnacles?

• Parasitism

• Competition

• Commensalism

Which of the following describes a predator/prey relationship in a freshwater environment?

• Dragonflies capture and eat mosquito larvae in a river.

• Algae in a lake makes its own food from sunlight.

• Male fish in a pond fight each other for females.

Tags

NGSS.MS-LS2-2

Mycorrhizae is a fungus living on the roots of orchids. Which of the following observations would be consistent with the claim that this relationship is mutualism?

• The orchid plant grows healthier and the fungus gains nutrients from the root of the orchid.

• The fungus grows rapidly on the root system of the orchid plant and finally kills it

• The orchid plant is unable to stop the fungus from spreading throughout it root system

Tags

NGSS.MS-LS2-4

Which type of relationship occurs when multiple organisms seek the same resources?

• Predation

• Competition

• Parasitism

When a jellyfish paralyzes a tiny fish with its venomous tentacles in order to eat it, the fish is:

• Parasite

• Prey

• Host

A species of insect is newly introduced into the United States from the Philippines. This insect becomes established, laying its eggs on the leaves of oak trees. How can a biologist distinguish if the relationship between the insect and the oak tree is commensalism, mutualism, or parasitism?

• If the insect benefits and the tree neither benefits nor is harmed, the relationship is mutualism.

• If the insect benefits and the tree neither benefits nor is harmed, the relationship is commensalism.

• If both the insect and the tree benefit, the relationship is commensalism.

Which of the following describes an interaction between a biotic factor and an abiotic factor?

• A black bear uses a cave for a winter home

• A squirrel gathers nuts to store for winter

• A vulture eats the remains of a wild pig

Tags

NGSS.MS-LS2-3

Which of the following describes a change to an abiotic factor that could harm a squirrel’s habitat?

• Deforestation leading to reduced nesting sites in trees

• Increase in the population of local predators

• Increase in the population of food plants

• Drought that depletes available water

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4