BIO 1409 EXAM 2 WITH QUESTIONS AND WELL
VERIFIED ANSWERS [ALREADY GRADED A+] REAL
EXAM 10O%
characteristics of early land plants - ANS✔✔---dependent on water to survive
thin external cell walls
photosynthetic with stomata
no vascular conducting tissue
flagellated sperm have to swim to the egg
mosses - ANS✔✔---Polytrichium, Sphagnum
dominant gametophyte
sperm produced in antheridium
egg produced in archegonium
sperm must swim to the egg
,liverworts - ANS✔✔---Marchantia
seedless, non vascular
can reproduce asexually via gemma cups
antheridium - ANS✔✔---sperm producing organ in moss
archagonium - ANS✔✔---egg producing organ in moss
primitive living plants - ANS✔✔---lycopodium, selaginella, ferns, equisetum
club mosses - ANS✔✔---lycopodium and selaginella
prokaryotes - ANS✔✔---do not have a nucleus
simplest, smallest, most abundant and successful cells
characteristics of prokaryotes - ANS✔✔---biomass is 10X weight of all other orgs on
earth combined
rapid growth rate
replicate by binary fission
Domain Archaea - ANS✔✔---prokaryotic
structurally, molecularly very different from normal bacteria
cell wall lacks peptidoglycan
withstand harsh and unusual conditions
, Domain Bacteria - ANS✔✔---contains most of bacteria
cell walls contain peptidoglycan
peptidoglycan - ANS✔✔---chains of sugars connected by amino acids
form sheets on cell walls of bacteria
functions of the external cell wall - ANS✔✔---protects cell from outside environment
prevents cell from breaking apart when takes on water
establishes and maintains shape
capsule - ANS✔✔---structure outside of the external cell wall in gram positive
bacteria
outside of outer membrane in gram negative bacteria
capsule functions - ANS✔✔---protects against phagocytosis (engulfment by white
blood cells)
allows bacteria to stick to surfaces
provides virulence (ability to cause disease)
flagella - ANS✔✔---organelles of motion
move cell toward or away from stimulus
fimbriae (pili) - ANS✔✔---allow bacteria to stick to surfaces or to each other
sex pili - ANS✔✔---connects 2 bacteria
one bacterium transfers DNA to the other
VERIFIED ANSWERS [ALREADY GRADED A+] REAL
EXAM 10O%
characteristics of early land plants - ANS✔✔---dependent on water to survive
thin external cell walls
photosynthetic with stomata
no vascular conducting tissue
flagellated sperm have to swim to the egg
mosses - ANS✔✔---Polytrichium, Sphagnum
dominant gametophyte
sperm produced in antheridium
egg produced in archegonium
sperm must swim to the egg
,liverworts - ANS✔✔---Marchantia
seedless, non vascular
can reproduce asexually via gemma cups
antheridium - ANS✔✔---sperm producing organ in moss
archagonium - ANS✔✔---egg producing organ in moss
primitive living plants - ANS✔✔---lycopodium, selaginella, ferns, equisetum
club mosses - ANS✔✔---lycopodium and selaginella
prokaryotes - ANS✔✔---do not have a nucleus
simplest, smallest, most abundant and successful cells
characteristics of prokaryotes - ANS✔✔---biomass is 10X weight of all other orgs on
earth combined
rapid growth rate
replicate by binary fission
Domain Archaea - ANS✔✔---prokaryotic
structurally, molecularly very different from normal bacteria
cell wall lacks peptidoglycan
withstand harsh and unusual conditions
, Domain Bacteria - ANS✔✔---contains most of bacteria
cell walls contain peptidoglycan
peptidoglycan - ANS✔✔---chains of sugars connected by amino acids
form sheets on cell walls of bacteria
functions of the external cell wall - ANS✔✔---protects cell from outside environment
prevents cell from breaking apart when takes on water
establishes and maintains shape
capsule - ANS✔✔---structure outside of the external cell wall in gram positive
bacteria
outside of outer membrane in gram negative bacteria
capsule functions - ANS✔✔---protects against phagocytosis (engulfment by white
blood cells)
allows bacteria to stick to surfaces
provides virulence (ability to cause disease)
flagella - ANS✔✔---organelles of motion
move cell toward or away from stimulus
fimbriae (pili) - ANS✔✔---allow bacteria to stick to surfaces or to each other
sex pili - ANS✔✔---connects 2 bacteria
one bacterium transfers DNA to the other
