ES036A-K2 Prelim Exam

A population's role in the community or the resources it uses is called its _____?

• habitat

• succession

• trophic structure

• niche

Ecology is primarily concerned with the interactions of organisms and the environment. What name is given to the phenomenon whereby a species will inhabit a hostile environment, die and provide nutrients; this in turn allows a greater variety of species to inhabit and survive in the area?

• Backlash

• Development

• Displacement

• Succession

In this given food chain, which is the apex predator?

• Grass

• Grasshopper

• Frog

• Snake

• Owl

Who coined the term biosphere?

• Odum

• Suess

• Haeckel

• Lindegren

Nitrogen fixation is:

• Nitrogen to Ammonia

• Nitrogen to Amino acid

• Both Nitrogen to Ammonia and Nitrogen to Nitrates

• Nitrogen to Nitrates

Types of forests found near the equator are:

• Coniferous forests

• Deciduous forests

• Tropical rain forests

• Grasslands

Two species or populations compete for the same resources, and one will eventually exclude the other. What is the technical term for this?

• Predation

• Mutualism

• Amensalism

• Competition

Algae and fungi often come together in a symbiotic relationship that benefits them both. In this relationship, fungi, which are incapable of making their own food get their nutrition from the algae, which are capable of photosynthesis. On the other hand, fungi are beneficial for the algae; they provide the usually-defenceless organisms with protection with their property of repelling herbivorous predators, killing micro-organisms, etc. In what organism are these relationships seen?

• corals

• lichens

• mosses

• ferns

The phosphorus cycle is in the form of:

• (PO4)^3-

• HPO3

• P2 (a gas)

• AlPO4

Maximum oxygen comes from:

• Forests

• Phytoplankton

• Herbs and shrubs

• Grasslands