Darwin's main idea of natural selection was:

Darwin better understood the mechanism for natural selection after he read a book by ____ on the rate of growth of populations

_____ results from microevolutionary changes that increase the likelihood of survival and reproduction

Archaeopteryx represents the transition between what two groups?

Biochemical changes that occur in organisms through time can help us:

The evidence for evolution includes which of the following?

Sizes of natural populations remain relatively stable over time because _____ limits population numbers

Different finches on each of the Galapagos Islands is the result of

In small populations, gene frequencies can change drastically by chance alone. This phenomenon is called:

When only a very few individuals give rise to a new population in a new area of favorable habitat, they might differ in appearance from the other, larger population from which they separated. This effect is called the:

In human infants, there has long been evolution toward having the highest survival rate at a 6-7 pound birth weight. This is an example of:

When selection operates to eliminate intermediate phenotypes, it is referred to as:

Sickle-cell anemia in humans is an example of:

Two populations of flowers are separated by a mountain range and would not be capable of interbreeding. This is an example of:

Bees may pick up pollen of one species on a certain place on their bodies; if this area does not come into contact with the receptive structures of the flowers of another plant species, the pollen is not transferred.

If two species of plants bloom during different seasons in the same habitat, this is known as:

The differences produced between breeds produced by artificial selection are more distinctive than differences between wild species

New gene variations are constantly being introduced into populations through random mutations

Darwin's evidence that evolution occurs included

The person responsible for the current scheme for grouping organisms is:

The scientific names we used to identify organisms are in the form of:

The science that deals with the naming and grouping of organisms is:

Choose the highest, most inclusive category

To what class does the Eastern Gray Squirrel belong?

A branching tree that represents the evolutionary relationships among a number of species is, in scientific terms, called a(n):

A group of organisms at a particular level in a system of classification is called a(n):

Cladograms will group birds with reptiles because these groups share:

Extreme thermophiles belong in what group?

The kingdoms within Eukarya:

Which of the following is not an example of a member of Archaea?

Which of the following kingdoms can do photosynthesis?

Mold and Yeast are....

In classification, the taxonomic group just below family is:

Which of the following sets of kingdoms contain organisms that are capable of photsynthesis?

According to the fossil record, prokaryotes have been on the earth for more than

Bacteria reproduce by

The simplest and most abundant form of life on earth today are the:

Key roles performed by bacteria on earth include

Viruses contain ____ as their genetic material

______ consist of a core of segments of dna or rna surrounded by a protein coat

Discovery that viruses act more like a chemical than an organism came from work with the:

The viruses that can infect bacterial cells are:

Which of the following diseases can be considered among the most devastating of all time?

Which of these kingdoms is the most diverse?

The primary characteristics of protists is that they are

amoebas move by

All protists are eukaryotic

Protists that have unique, double shells of silica and chlorophylls a and c called

A group of protists that use cilia to move include the

There are ____ different described species of fungi

A lichen is made up of an ____ and a ____-

Fungi which are never observed to produce sexual spores are known as

The fungal phyla are distinguished primarily by

A mass of fungal hyphae is called a

In order to disperse water throughout themselves more effectively, plants evolved

There are an estimated _____ species of plants alive today

The first successful land plants, even though they lacked vascular tissue, were probably the

Seedless vascular plants, like ferns, require ____ for fertilization

Mosses, liverworts, and hornworts do not reach large size because

The first vascular plants occurred in the fossil record ____ years ago

During the sporophyte generation in the life cycle of a fern, the plant releases _____ that germinate and become gametophytes

Which group has the tallest living specimens today?

What is not a group of gymosperms?

What kinds of angiosperms have reverted to wind pollinations?

Monocots typically have leaves with ____ veins and flowers with ____ parts per whorl

The primary function of fruit is

The flower structure that holds pollen is called a(n)

In most angiosperms, pollen is dispersed by ____

Which part of a flower is green and leaf-like?

The part of the flower which eventually becomes the fruit is the

Chordates can be characterized by having

Both roundworms and rotifers are pseudocoelomates

The first animal group to show extracellular digestion was the

The first animal group to show extracellular digestion was the

What term does not apply to platyhelminthes?

Cnidarians and ctenophorans differ from other eumetazoans by having

the type of body cavity seen in the roundworms that develops between mesoderm and endoderm layers is a

the subkingdom of animals that lack symmetry and have no true tissues or organs is the

animals in which the anus develops before the mouth in the embryo are

All of the following are correct about protostomes except

the advantage of bilateral symmetry is that it allowed for the evolution of

Of the mollusks, the octopuses are in the class of

Mammals that have live births but continue to incubate newborns in a pouch are

The type of fish represented by the most living species on earth today are the

The function of the notochord is taken over by the _____ in vertebrates

the very first vertebrates were

amniotic eggs evolved as a means to

Which of the following is the correct evolutionary sequence?

Bony fishes possess a lateral line system to

An example of a modern day jawless fish is

reptiles were better adapted to land than amphibians because they

choose the best definition of the term "ecology"

Which of the following is NOT a component of the physical habitat in which organisms live?

all of the different kinds of interacting organisms living within a certain area make up a

Life exists on earth because of the constant flow of light energy from the sun that is transformed into chemical

which of the following represents r-selected populations

Which of the following examples best represents K-selected populations?

No two species with the same entire niche can coexist

which of the following is an example of a biome?

Which of the following is an abiotic component of an ecosystem?

What is carrying capacity?

when the energy flow through an ecosystem is measured at each trophic level, _____ of the available energy passes from one level to the next

the loss of ___ that occurs at each trophic level places a limit on how many top-level carnivores a community can support

Herbivores are at what trophic level within an ecosystem?

the total amount of energy fixed by photosynthetic organisms minus the energy used in their own metabolic activities is

plants obtain the carbon used in the manufacture of organic compounds from

certain bacteria are capable of transforming atmospheric nitrogen into a form other organisms can use through a process known as

humans intrude into the nitrogen cycle by

The british isles experience warmer weather than other areas of the same latitude because of

highly productive lakes with an abundance of organic material are called

a ____ is a type of major land ecosystem determined mostly by the features of the climate in the area. many are actually named for the dominant plants or lack of.

the type of ecosystem that can be found bordering the tropics worldwide that is characterized by huge herds of grazing animals is

circling the globe at northern latitudes is ___, with coniferous trees and long, cold winters

all are detritivores except

the tropics are warmer than the temperate regions because

where is an estuary found?

when you eat a hamburger you are the

which element is related to the formation of acid rain?

acid rain can lead to the destruction of

Which of the following does global warming effect?

trapping of heat in the earth's atmosphere by certain gases called the ____ effect

Which of the following is the most important cause of extinction?

Which of the following gases is related to the development of the ozone hole?

_____ catalyzes the reaction that converts O3 into O2

which of the following is a non-replaceable resource?

Which of the following is closest to today's human population number?

Which is not an alternative energy source?

if all humans lived at the standard of living in the developed world, two additional planet Earth's would be needed.

the increasing concentration of a chemical as it moves through the links in a food chain is called