General Biology

Homologous structures among major groups of organisms may differ in _____ .

Homologous structures among major groups of organisms may differ in _____ .

Homologous structures among major groups of organisms may differ in _____ .
 
  a. size
  b. shape
  c. function
  d. all of these

Question 2

Through _____ , a body pa

m671   52   2 Replies

m671

Biologists define evolution as _____. (Multiple Choice)

Biologists define evolution as _____. (Multiple Choice)

Biologists define evolution as _____.
 
  a. purposeful change in a lineage
  b. heritable change in a line of descent
  c. acquiring traits during the individual's lifetime

Question 2[/col

ornobtizzi   36   2 Replies

ornobtizzi

Evolution can only occur in a population when _____.

Evolution can only occur in a population when _____.

Evolution can only occur in a population when _____.
 
  a. mating is random
  b. there is selection pressure
  c. neither is necessary

Question 2

_____ is the original sourc

skyleton   61   3 Replies

ddd856

Stabilizing selection tends to _____ (select all that apply).

Stabilizing selection tends to _____ (select all that apply).

Stabilizing selection tends to _____ (select all that apply).
 
  a. eliminate extreme forms of a trait
  b. favor extreme forms of a trait
  c. eliminate intermediate forms of a trait
  d. favor intermediate forms of a trai

cb2015   86   2 Replies

cb2015

Directional selection tends to _____ (select all that apply).

Directional selection tends to _____ (select all that apply).

Directional selection tends to _____ (select all that apply).
 
  a. eliminate extreme forms of a trait
  b. favor an extreme form of a trait
  c. eliminate intermediate forms of a trait
  d. favor intermediate forms of a tr

Hoshuia   61   3 Replies

tyeoi

The persistence of malaria and sickle-cell anemia in a population is a case of _____.

The persistence of malaria and sickle-cell anemia in a population is a case of _____.

The persistence of malaria and sickle-cell anemia in a population is a case of _____.
 
  a. bottlenecking
  b. balanced polymorphism
  c. natural selection
  d. artificial selection
  e. balanced polymorphism and nat

Alexis23   74   2 Replies

Alexis23

In evolutionary trees, each node represents a(n) _____.

In evolutionary trees, each node represents a(n) _____.

In evolutionary trees, each node represents a(n) _____.
 
  a. single lineage
  b. extinction
  c. point of divergence
  d. adaptive radiation

Question 2

_____ tend

Johnnyvic   39   3 Replies

lizfloyd1

An abundance of _____ in the atmosphere would have prevented the spontaneous assembly of organic ...

An abundance of _____ in the atmosphere would have prevented the spontaneous assembly of organic ...

An abundance of _____ in the atmosphere would have prevented the spontaneous assembly of organic compounds on early Earth.
 
  a. hydrogen
  b. methane
  c. oxygen
  d. nitrogen

Que

Daddy667   34   2 Replies

Daddy667

Ribosomes can catalyze formation of peptide bonds. This supports the hypothesis that _____ .

Ribosomes can catalyze formation of peptide bonds. This supports the hypothesis that _____ .

Ribosomes can catalyze formation of peptide bonds. This supports the hypothesis that _____ .
 
  a. an RNA world preceded DNA-based genomes
  b. RNA can hold more information than DNA
  c. the first protists had RNA as their gene

ridhima14598   61   2 Replies

ridhima14598

The evolution of _____ resulted in an increase in the levels of atmospheric oxygen.

The evolution of _____ resulted in an increase in the levels of atmospheric oxygen.

The evolution of _____ resulted in an increase in the levels of atmospheric oxygen.
 
  a. sexual reproduction
  b. aerobic respiration
  c. the noncyclic pathway of photosynthesis
  d. the cyclic pathway of photosynthesis[b

riiiiooottt   46   3 Replies

esimpso3

What was the energy source in the Miller-Urey simulation of conditions on the early Earth? What ...

What was the energy source in the Miller-Urey simulation of conditions on the early Earth? What ...

What was the energy source in the Miller-Urey simulation of conditions on the early Earth?
 
  What will be an ideal response?

Question 2

Mitochondria most resemble _____.
 

bessieboo97   32   3 Replies

newstudent

Oxygen released by _____ accumulated in the atmosphere and produced the ozone layer.

Oxygen released by _____ accumulated in the atmosphere and produced the ozone layer.

Oxygen released by _____ accumulated in the atmosphere and produced the ozone layer.
 
  a. archaeans
  b. aerobic bacteria
  c. cyanobacteria
  d. early eukaryotes

Question 2[/color

roltschj   48   3 Replies

ben.kenobi24

A rise in oxygen in Earth's air and seas put organisms that engaged in _____ at a selective ...

A rise in oxygen in Earth's air and seas put organisms that engaged in _____ at a selective ...

A rise in oxygen in Earth's air and seas put organisms that engaged in _____ at a selective advantage.
 
  a. aerobic respiration
  b. fermentation
  c. photosynthesis
  d. sexual reproduction

[fa]ch

kimmykgirl19   25   2 Replies

kimmykgirl19

Chloroplasts most resemble _____. (Multiple Choice)

Chloroplasts most resemble _____. (Multiple Choice)

Chloroplasts most resemble _____.
 
  a. archaeans
  b. aerobic bacteria
  c. cyanobacteria
  d. early eukaryotes

Question 2

Which of the following was not present on E

roltschj   66   2 Replies

roltschj

All flagellated protozoans _____. (Multiple Choice)

All flagellated protozoans _____. (Multiple Choice)

All flagellated protozoans _____.
 
  a. lack mitochondria c. live as single cells
  b. are photosynthetic d. cause disease

Question 2

Which provides a more stable genome, DNA

teysha   50   3 Replies

Mtnimp

The presence of a contractile vacuole indicates that a single-celled protist _____.

The presence of a contractile vacuole indicates that a single-celled protist _____.

The presence of a contractile vacuole indicates that a single-celled protist _____.
 
  a. is marine c. is photosynthetic
  b. lives in fresh water d. secretes a toxin

Question 2
[b

Jkader   86   3 Replies

domsantos1998

An insect bite can transmit a disease-causing _____ to a human host.

An insect bite can transmit a disease-causing _____ to a human host.

An insect bite can transmit a disease-causing _____ to a human host.
 
  a. trypanosome c. ciliate
  b. apicomplexan d. both trypanosome and apicomplexan

Question 2

Cattle ben

garysgirl20   56   3 Replies

ANGIEYQ

Accessory pigments of _____ allow them to carry out photosynthesis at greater depths than other ...

Accessory pigments of _____ allow them to carry out photosynthesis at greater depths than other ...

Accessory pigments of _____ allow them to carry out photosynthesis at greater depths than other algae.
 
  a. euglenoids c. brown algae
  b. green algae d. red algae

Question 2
[b

LesleyCher   62   3 Replies

macchamugicha

The _____ are important plant pathogens.

The _____ are important plant pathogens.

The _____ are important plant pathogens.
 
  a. dinoflagellates c. water molds
  b. ciliates d. slime molds

Question 2

The protist that causes malaria is _____.
 
  a

YAZID   52   2 Replies

YAZID

The sporophyte of a multicellular alga _____.

The sporophyte of a multicellular alga _____.

The sporophyte of a multicellular alga _____.
 
  a. is haploid c. produces spores
  b. is a single cell d. produces gametes

Question 2

Silica-rich shells of ancient diatoms a

Bishopoutlaw   37   1 Reply

Mtnimp

The organism that causes the sexually transmitted disease trichomoniasis is a _____.

The organism that causes the sexually transmitted disease trichomoniasis is a _____.

The organism that causes the sexually transmitted disease trichomoniasis is a _____.
 
  a. flagellated protozoan c. ciliate
  b. radiolarian d. apicomplexan

Question 2

Where wo

Jkader   40   2 Replies

Jkader

The first plants were _____. (Multiple Choice)

The first plants were _____. (Multiple Choice)

The first plants were _____.
 
  a. ferns c. bryophytes
  b. flowering plants d. conifers

Question 2

All green algae _____.
 
  a. have a cell wall c. are multicell

ilan707   111   3 Replies

whatever77

In byophytes, eggs are fertilized in a chamber on the _____ and a zygote develops into a _____. ...

In byophytes, eggs are fertilized in a chamber on the _____ and a zygote develops into a _____. ...

In byophytes, eggs are fertilized in a chamber on the _____ and a zygote develops into a _____.
 
  a. sporophyte: gametophytes c. sorus; cone
  b. gametophyte: sporophyte

Question 2

bessieboo97   49   1 Reply

carelesslycool

Horsetail and ferns are _____ plants.

Horsetail and ferns are _____ plants.

Horsetail and ferns are _____ plants.
 
  a. multicelled aquatic c. seedless vascular
  b. nonvascular seed d. seed-bearing vascular

Question 2

Coal consists primarily of comp

Nudee88   67   2 Replies

Nudee88

A seed is a _____. (Multiple Choice)

A seed is a _____. (Multiple Choice)

A seed is a _____.
 
  a. female gametophyte c. mature pollen grain
  b. mature ovule d. modified microspore

Question 2

The _____ produce flagellated sperm.
 
  a.

Ebridges85   111   1 Reply

Lauraem32

Only angiosperms produce______________. (Multiple Choice)

Only angiosperms produce______________. (Multiple Choice)

Only angiosperms produce______________.
 
  a. pollen c. fruits
  b. seeds d. all of the above

Question 2

True or false? Both spores and sperm of a seedless vascular plant are hap

pch123   64   1 Reply

tyeoi

A waxy cuticle helps land plants ______________.

A waxy cuticle helps land plants ______________.

A waxy cuticle helps land plants ______________.
 
  a. conserve water c. reproduce
  b. take up carbon dioxide d. stand upright

Question 2

Lignin is not found in stems of ______

diamonddiva007   63   2 Replies

diamonddiva007

Some plant secondary metabolites are used as______________.

Some plant secondary metabolites are used as______________.

Some plant secondary metabolites are used as______________.
 
  a. fuel c. textiles
  b. medicines d. flooring

Question 2

Cereal crops such as rice and corn are_______________

Ebridges85   24   1 Reply

bhinz

Saprobic fungi obtain nutrients from _____.

Saprobic fungi obtain nutrients from _____.

Saprobic fungi obtain nutrients from _____.
 
  a. nonliving organic matter c. living animals
  b. living plants d. living plants and living animals

Question 2

All fungi _____.

dundlermuffin   44   2 Replies

dundlermuffin

The yeasts whose fermentation reactions produce carbon dioxide that makes bread rise are a type of ...

The yeasts whose fermentation reactions produce carbon dioxide that makes bread rise are a type of ...

The yeasts whose fermentation reactions produce carbon dioxide that makes bread rise are a type of _____.
 
  a. chytrid c. sac fungus
  b. zygote fungus d. club fungus

Question 2
[

dixoncsk2062   55   1 Reply

merana.potros

The mycelium of a multicelled fungus is a mesh of filaments, each called a _____. (Fill in the blank)

The mycelium of a multicelled fungus is a mesh of filaments, each called a _____. (Fill in the blank)

The mycelium of a multicelled fungus is a mesh of filaments, each called a _____.
 
  Fill in the blank(s) with correct word

Question 2

In many _____, an extensive dikaryotic mycel

G.zepp   55   1 Reply

fayez_83

Spores released from a mushroom's gills are _____.

Spores released from a mushroom's gills are _____.

Spores released from a mushroom's gills are _____.
 
  a. diploid c. dikaryotic
  b. haplid

Question 2

A mushroom is _____.
 
  a. the digestive organ of a club fun

ornobtizzi   40   2 Replies

ornobtizzi

_____are micorrhizal fungi with hyphae that grow into a root cell and branch inside it.

_____are micorrhizal fungi with hyphae that grow into a root cell and branch inside it.

_____are micorrhizal fungi with hyphae that grow into a root cell and branch inside it.
 
  a. Glomeromycetes c. Zygote fungi
  b. Chytrids d. Club fungi

Question 2

_____ are fun

reubank   38   3 Replies

butterfly

Histoplasmosis is an example of a _____.

Histoplasmosis is an example of a _____.

Histoplasmosis is an example of a _____.
 
  a. mycelium c. mycorrhiza
  b. lichen d. mycosis

Question 2

_____ are mycorrhizal fungi with hyphae that grow into a root cell and b

Maria   26   3 Replies

Kandygal17

Ergotism _____. (Multiple Choice)

Ergotism _____. (Multiple Choice)

Ergotism _____.
 
  a. results from inhalation of fungal spores
  b. produces hallucinations and convulsions
  c. affects only those with weak immune systems
  d. all of the above

Ques

claudiawong05   63   1 Reply

ghdfharfg

A coelom is a _____. (Multiple Choice)

A coelom is a _____. (Multiple Choice)

A coelom is a _____.
 
  a. type of bristle c. sensory organ
  b. resting stage d. lined body cavity

Question 2

True or false? Animal cells do not have cell walls.
 

Maria   54   2 Replies

Maria

Flukes are most closely related to _____.

Flukes are most closely related to _____.

Flukes are most closely related to _____.
 
  a. tapeworms c. arthropods
  b. roundworms d. echinoderms

Question 2

Cnidarians alone have _____.
 
  a. nematocysts c

G.zepp   71   2 Replies

G.zepp

The _____ are mollusks with a hinged shell.

The _____ are mollusks with a hinged shell.

The _____ are mollusks with a hinged shell.
 
  a. bivalves
  b. barnacles
  c. gastropods
  d. cephalopods

Question 2

Which group has six legs and two antennae?

krystian   61   1 Reply

oliverb1

Which of these groups includes the most species?

Which of these groups includes the most species?

Which of these groups includes the most species?
 
  a. protostomes
  b. roundworms
  c. arthropods
  d. mollusks

Question 2

A spider's chelicerae _____.
 

Najmnour   25   1 Reply

ahleaders

The _____ have a coelom and are radial as adults.

The _____ have a coelom and are radial as adults.

The _____ have a coelom and are radial as adults.
 
  a. cnidarians c. annelids
  b. echinoderms d. placozoans

Question 2

The _____ include the only winged invertebrates.

loryatchy   28   2 Replies

loryatchy