Biology Final Practice Test

1.

1 point

The nutrient availability of aquatic ecosystems is the

amount of nitrogen, oxygen, and other elements dissolved in the water

amount of rainfall the water receives

number of other organisms present in the water

number of different animal species living in the water

2.

1 point

Where are photosystems I and II found?

in the Calvin Cycle

in the stroma

in the thylakoid membrane

in the cell membrane

3.

1 point

If you know the range of a population, then you know

the number of individuals that live in an area

the type of climate it lives in

the birth rate and death rate

the areas that are inhabited by the population

4.

1 point

A scientific hypothesis

can be tested by experiments or observations

can be based on personal beliefs or opinions

is a proven fact with much evidence to support it

does not have to be tested or accepted as correct

5.

1 point

What animals eat both producers and consumers?

herbivores

autotrophs

omnivores

chemotrophs

6.

1 point

By preserving hot spots, ecologist hope to protect species in danger of extinction due to

biological magnification

captive breeding programs

expanding national parks

human activity

7.

1 point

A developer wants to build a new housing development in or around a large city. Which of the following plans would be LEAST harmful to the environment?

Building a neighborhood in a meadow at the edge of the city

Filling a wetland area and building oceanfront condominiums

Clearing a forested area outside of the city to build houses

Building apartments at the site of an abandoned factory in the city

8.

1 point

Estuaries are commercially important because

tumber trees grow in estuaries

fossil fuels are found in estuaries

fish species that people buy and sell live in estuaries

tall buildings can be built in estuaries

9.

1 point

Why is an organism's niche like a person's occupation?

A niche is a "factory" where organisms build things

A niche is a "company" that the organism has to work in

An organism makes "money" by working in its niche

An organism can "make a living" and survive in its niche

10.

1 point

Demographic transition is change from high birth rates and high death rates to

indefinite growth

low birthrates and low death rates

exponential growth

low birthrates and high death rates

11.

1 point

Primary succession would most likely occur after

farm land is abandoned

a forest fire

a severe storm

a lava flow

12.

1 point

Which of the following is a function of the cytoskeleton?

contains DNA

helps a cell keep its shape

helps make proteins

surrounds the cell

13.

1 point

Which ecological inquiry method is an ecologist using when they set up a greenhouse and measures the effects of different levels of carbon dioxide on an endangered plant species?

modeling

questioning

experimenting

observing

14.

1 point

Which term describes the relatively constant internal physical conditions of an organism?

homeostasis

cell specialization

organ system

unicellularity

15.

1 point

Solutions that have more OH- ions that H+ ions are

reactants

bases

acids

enzymes

16.

1 point

If a lake receives a large input of a limiting nutrient, which of these would happen first?

Nitrogen compounds are recycled

The concentration of oxygen drops below the necessary level

An algal bloom occurs

Algae begin to die and decompose take over

17.

1 point

Which of the following is NOT a principle of the cell theory?

All living things are made of cells

Very few cells are able to reproduce

All cells are produced from existing cells

Cells are the basic units of life

18.

1 point

Which of the following is NOT true about chlorine?

It was used in battles in World War I

It combines with sodium to form table salt

It is not reactive

It is a poisonous, greenish gas

19.

1 point

Organisms that cannot make their own food and must obtain energy from external sources are called

thylakoids

autotrophs

heterotrophs

plants

20.

1 point

Sea otters live in the ocean. Which of the following is NOT likely to be a limiting factor on the sea otter population?

disease

competition

drought

predation

21.

1 point

Animals get the most of the nitrogen they need

by breathing in atmospheric nitrogen

by consuming plants and other animals

directly from bacteria in the soil

from the process of dentrification

22.

1 point

Which organelle converts the chemical energy stored in food into compounds that are more convenient for the cell to use?

endoplasmic reticulum

chloroplast

mitochondrion

Golgi apparatus

23.

1 point

Unlike the cell membrane, the cell wall is

selectively permeable

found in all organisms

composed of a lipid bilayer

a rigid structure

24.

1 point

The primary function of the cell wall is to

help the cell move

support and protect the cell

direct the activities of the cell

store DNA

25.

1 point

Focusing on which 2 central themes in biology would help a student understand why animals come in different shapes and sizes

structure and function; unity and diversity of life

matter and energy; homeostasis

cellular basis for life; homeostasis

science as a way of knowing; interdependence of nature

26.

1 point

Carbon-12 is the most common type of carbon. It has 6 protons, 6 neutrons, and 6 electrons. Of its 6 electrons, 4 are valence electrons. How many covalent bonds can a carbon atom form?

1

6

12

4

27.

1 point

The process by which organisms keep everything inside their body within certain limits is called

homeostasis

photosynthesis

metabolism

evolution

28.

1 point

In the overall equation for photosynthesis, six molecules of carbon dioxide and six molecules of water result in a molecule of sugar and six molecules of

glucose

water

ATP

oxygen

29.

1 point

A symbiotic relationship in which one organism is harmed and the other benefits is

commensalism

mutualism

predation

parasitism

30.

1 point

Which of the following is NOT a function of proteins?

store and transmit genetic information

move substances in and out of cells

control the rate of reactions

help to fight disease

31.

1 point

In what ways are herbivores and carnivores alike?

They both use photosynthesis to make their own food

They both obtain energy by consuming other organisms

They both are considered to be autotrophs

They both directly consume producers

32.

1 point

Which organelles are involved in energy conversion?

mitochondria and chloroplasts

smooth and rough endoplasmic reticulum

Golgi apparatus and chloroplasts

mitochondria and ribosomes

33.

1 point

Which two biomes have the least participation?

boreal forest and temperate woodland and shrubland

tundra and desert

tropical rain forest and temperate grassland

tropical savanna and tropical dry forest

34.

1 point

What is the process that changes one set of chemicals into another set of chemicals?

chemical reaction

cohesion

dissolving

hydrogen bonding

35.

1 point

Which structures are involved in cell movement?

cytoplasm and ribosomes

microtubules and microfilaments

nucleolus and nucleus

chromosomes

36.

1 point

If an atom contains 11 protons and 12 neurons, its atomic number is

12

11

1

23

37.

1 point

The Calvin Cycle is another name for the

light-independent reactions

photosynthesis reaction

light-dependent reactions

electron transport chain

38.

1 point

A predator is an animal that

kills and eats other animals

lives on another animal without harming it

lives inside another animal

eats plants

39.

1 point

The land and water ecosystems that provide the resources that a person uses and that neutralize that person's wastes is part of that person's

ecological sustainability

biodiversity

ecological footprint

habitat

40.

1 point

Protecting an entire ecosystem ensures that

governments will set aside land

interactions among many species will be preserved

existing parks and reserves will expand

captive breeding programs will succeed

41.

1 point

A covalent bond is formed as the result of

sharing electrons

transferring protons

transferring electrons

sharing protons

42.

1 point

Which of the following is NOT a step in the light-dependent reactions?

High-energy electrons move through the electron transport chain

ATP synthase allows H+ ions to pass through the thylakoid membrane

ATP and NADPH are used to produce high-energy sugars

Pigments in photosystem II absorb light

43.

1 point

Which factor might NOT contribute to an exponential growth rate in a given population?

higher birthrates

reduced resources

less competition

lower death rates

44.

1 point

Which of the following is NOT a goal of science?

to investigate and understand the natural world

to establish a collection of unchanging truths

to explain events in the natural world

to use derived explanations to make useful predictions

45.

1 point

The simplest grouping of more than one kind of organisms in the biosphere is

a community

a population

a species

an ecosystem

46.

1 point

Which of the following is enclose their DNA in a nucleus?

viruses

eukaryotes

bacteria

prokaryotes

47.

1 point

In which way are plants in a sunny mountain meadow and sulfur bacteria in a deep-sea volcanic vent alike?

They both use chemosynthesis to produce their own food

They both produce carbohydrates and oxygen

They both produce carbon and hydrogen

They both use photosynthesis to make their own food

48.

1 point

How are phase 1 and phase 2 of logistic growth similar?

a population is at its carrying capacity during both phases

the death rate is higher than the birth rate during both phases

a population is increasing, moving toward its carrying capacity during both phases

the emigration rate is higher than the immigration rate during both phases

49.

1 point

Science differs from other disciplines, such as history and the arts, because science relies on

theories

observations

facts

testing explanation

50.

1 point

Which means of particle transport requires input of energy from the cell?

facilitated diffusion

active transport

diffusion

osmosis