Biology 101

An change in a population is:

Variations in phenotype within a population are primarily due to _____.

Two or more slightly different molecular forms of a gene are called _____.

New alleles are created by _____.

Mutations affect a population by _____.

Antibiotic resistance is caused by _____.

An endangered species that is allowed to recover its former numbers is expected to be

biologists define evolution as

evolution can only occur in a population when

stabilizing selection tends to

disruptive selection tends to

directional selection tends to

sexual selection, such as competition between males for access to fertile females, frequently influences aspects of body form and can lead to

the persistence of the sickle allele at high frequency in a population is a case of

___ tends to keep different populations of a species similar to one another

a fire devastates all tree in a wide swath of forest. populations of a species of tree-dwelling frog on either side of the burned area diverge to become separate species. this is an example of

cladistics is based on

in evolutionary trees, each node represents

in cladograms, sister groups are

___ can lead to interdependent species

___ changes in a population's allele

___ alleles enter and leave a population

___ evolutionary history

___ occurs in different patterns

___ burst of divergences from one lineage into a set of niches

____ source of new alleles

___ diagram of sets within sets

an abundance of ___ in the atmosphere would have prevented the assembly of complex organic compounds

stanley miller's experiment demostrated

the evolution of ___ resulted in an increase in the amount of oxygen in the atmosphere

mitochondria are most likely descendants of

bacteria transfer genes to a partner cell by

the first eukaryotes were

some protists are more related to plants than to other protists
True False

freshwater protists have a ___ that expels excess water

the ___ are parasitic eukaryotes that live in other cells

remains of ___ form chalk and limestone deposits

some of the ___ are human pathogens

green algae are most closely related to ___ algae

silica-rich remains of ___ are used as an insecticide

the genetic material of a ___ may be DNA or RNA

___ prootist population explosion

___ social amoeba

___ most diverse prokaryotes

___ noncellular infectious agent

___ include the largest protists

___ flagellate with chloroplasts

___ closest relative of plants

___ layered prokaryotes and sediment

___ resistant resting stage

___ whirling cell

which of the following statements is not correct

which does not apply to gymnosperms or angiosperms

bryophytes have independent ___ and attached, dependent ___

ferns are classified as ___ plants

the ___ produce flagellated sperm

the ___ produced in the male cones of a conifer develop into pollen grains

a seed is

the ___ are the most diverse seedless vascular plants

___ gamete-producing body

___ help control water loss

___ "naked" seeds

___ spore-producing body

___ nonvascular land plant

___ seedless vascular plant

___ flowering plant

all fungi

saprobic fungi derive nutrients from

a mushroom is

a ___ is a fungus-plant root partnership

a ___ is a composite organism composed of a fungus and a single-celled photosynthetic species

fungal skin infections are often fatal
True False