Ch 24 & 25 study

Question 1

Ifthemitochondria&chloroplastsineukaryoticcell resultedfromendosymbiosis,whatfeaturesmightwe expecttheseorganellestocont

Accepted Answer

plasma membrane, DNA, and ribosomes

Question 2

Radioactive decay half-life

Accepted Answer

The time required for 50% of the radioactive isotope to decay.

Question 3

Eukaryotic cells first appeared about ?

Accepted Answer

1.2 billion years ago

Question 4

Radiometric dating can't determine the autal age of the foosil ( or the adjacnet rock layers)

Accepted Answer

False

Question 5

An evolutionary event that took place 500 million years ago would have happened in what era?

Accepted Answer

Paleozoic

Question 6

Sympatric Speciation

Accepted Answer

Speciation takes place in geographically overlapping populations

Question 7

If a fossil has 0.25% 14C as compared to 12C, how many years ago was that organism alive?

Accepted Answer

11,400 years old

Question 8

If the above clock represent the history of the earth taking place over 1 hour, at what time did animals first appear?

Accepted Answer

9 minutes ago

Question 9

the first cells (prokarytoic) appeared about

Accepted Answer

3.5 billion years ago

Question 10

Clock represent the history of the earth taking place over 1 hour,at what time did multicellular eukaryotes first appear

Accepted Answer

15 minutes ago

Question 11

Endosymbiont theory

Accepted Answer

Posits that mitochondria and plastids were formerly small prokaryotes, that began living within larger cells.

Question 12

Colonization of land by fungi, plants, and animals took place about 500 billion years ago

Accepted Answer

False

Question 13

If a fossil has 0.5% 14C as compared to 12C, how many years ago was that organism alive?

Accepted Answer

5700 years old

Question 14

An evolutionary event that took place 2 billion years ago would have happened in what era?

Accepted Answer

Proterozoic

Question 15

If the above clock represent the history of the earth taking place over 1 hour, at what time did humans first appear?

Accepted Answer

0.2 seconds ago

Question 16

Most causes of speciation are relatively slow,in that they may takemany generations to see changes,with the exception of

Accepted Answer

polyploidy

Question 17

The production of sterile mules by interbreeding between femalehorses (mares) and male donkeys (jacks) is an example of.

Accepted Answer

reduced hybrid fertility

Question 18

If biological species are defined in terms of reproductive compatibility,the formation of a new species hinges on _____.

Accepted Answer

reproductive isolation

Question 19

maroevlution

Accepted Answer

Broad patterns of evlutionary change above the species level

Question 20

If the above clock represent the history of the earth taking place over 1 hour,at what time did prokaryotes first appear

Accepted Answer

45 minutes ago

Question 21

Which of the following is a correct definition of Postzygotic Barriers?

Accepted Answer

Mechanism that prevent the hybrid zygote from developing into fertile adult

Question 22

Prezygotic Barriers

Accepted Answer

Mechanisms that block fertilization from occurring.

Question 23

If a fossil has 0.125% 14C as compared to 12C, how many years ago was that organism alive?

Accepted Answer

17,100 years old

Question 24

apperance of the first cells

Accepted Answer

prokaryotes

Question 25

Colonization of land by fungi, plants, and animals took place about __________?

Accepted Answer

500 milion years ago

Question 26

A correct definition of Macroevolution : Broad patterns of evolutionary change above the species level

Accepted Answer

True

Question 27

cast is a type of fossil

Accepted Answer

True

Question 28

Radiometric dating

Accepted Answer

Use the half-life of decay for radioactive isotopes to determine, the age of fossils or rocks in the geological strata

Question 29

Which of the following sequence of evolutionary events is consistent with current theories and the fossil record?

Accepted Answer

C

Question 30

Referring to the above graph, what would be fraction of 14C remaining in a fossil that was 57,000 years old?

Accepted Answer

1/1024

Question 31

Spider 1, is unable to impregnate Spider 2. These two juniper species are kept separate by ________.

Accepted Answer

gametic isolation

Question 32

Postzygotic Barriers

Accepted Answer

Mechanisms that prevent the hybrid zygote from developing into a viable

Question 33

What does the biological species concept use as the primary criterionfor determining species boundaries?

Accepted Answer

gene flow

Question 34

Which of the following describes the most likely order of events in allopatric speciation?

Accepted Answer

genetic isolation, genetic drift or natural selection, divergence

Question 35

Two species of garter snake occupy the same habitat but one lives mainly in water while the other is mainly terrestrial.

Accepted Answer

Pre-Zygotic Barrier – Habitat Isolation

Question 36

Multicellular eukaryotes first appeared about 1.8 billion years ago

Accepted Answer

True

Ch 24 & 25 study

Questions 36

Ch 24 & 25 study

Questions 36