Biology 1407- Exam 2 Questions with Correct
Answers
plants evolved from...
green algae
what pigment does green algae have?
chlorophyll a & b
non-vascular plants lack...
xylem & phloem
vascular tissue=
tissue that moves things
types of vascular tissue in plants=
xylem and phloem
give an example of a non-vascular plant
moss
which type of plant makes up 93% of all plants
vascular plants
_________ are a seedless vascular plant
ferns
what does gymnosperm mean?
has a naked seed
,flowering plants are called...
angiosperms
how did algae adapt to land?
Ancestral green algae inhabited shallow water where there was more sunlight. Occasionally,
the shallow areas would dry out. Natural Selection would favor individuals that could tolerate
drying out more than others. Those that could tolerate drying out would go on to reproduce
and pass on their DNA. Tolerant individuals were now exposed to virtually unlimited
resources with no competition. Adaptations occurred in the water, allowing them to move
onto land.
which type of stage-dominant plant lives longer?
sporophyte stage dominant
Bryophytes=
non-vascular plants
what stage is dominant with all Bryophytes?
Gametophyte stage
Types of Bryophytes:
1) Hornworts
2) Liverworts
3) Mosses
Rhizoids=
root-like structure produced by moss; actually just the stem, anchors it to the ground; doesn't
function in absorption
, male gametophyte=
antheridia
what does having flagellated sperm mean?
Means it swims, and therefore needs water in order to get to the egg
female gametophyte=
archegonia (produces egg)
these plants are generally low to the ground and thin...
non-vascular plants
why are non-vascular plants generally thin?
they don't have a vascular system/vascular tissue
define a seed
protective barrier with nutrients
what is the largest group of non-vascular plants?
mosses
define heterosporous
having one male spore, one female spore
how do mosses reproduce?
fragmentation or alternation of generations
mosses use this to reproduce...
antheridium and archegonia
Answers
plants evolved from...
green algae
what pigment does green algae have?
chlorophyll a & b
non-vascular plants lack...
xylem & phloem
vascular tissue=
tissue that moves things
types of vascular tissue in plants=
xylem and phloem
give an example of a non-vascular plant
moss
which type of plant makes up 93% of all plants
vascular plants
_________ are a seedless vascular plant
ferns
what does gymnosperm mean?
has a naked seed
,flowering plants are called...
angiosperms
how did algae adapt to land?
Ancestral green algae inhabited shallow water where there was more sunlight. Occasionally,
the shallow areas would dry out. Natural Selection would favor individuals that could tolerate
drying out more than others. Those that could tolerate drying out would go on to reproduce
and pass on their DNA. Tolerant individuals were now exposed to virtually unlimited
resources with no competition. Adaptations occurred in the water, allowing them to move
onto land.
which type of stage-dominant plant lives longer?
sporophyte stage dominant
Bryophytes=
non-vascular plants
what stage is dominant with all Bryophytes?
Gametophyte stage
Types of Bryophytes:
1) Hornworts
2) Liverworts
3) Mosses
Rhizoids=
root-like structure produced by moss; actually just the stem, anchors it to the ground; doesn't
function in absorption
, male gametophyte=
antheridia
what does having flagellated sperm mean?
Means it swims, and therefore needs water in order to get to the egg
female gametophyte=
archegonia (produces egg)
these plants are generally low to the ground and thin...
non-vascular plants
why are non-vascular plants generally thin?
they don't have a vascular system/vascular tissue
define a seed
protective barrier with nutrients
what is the largest group of non-vascular plants?
mosses
define heterosporous
having one male spore, one female spore
how do mosses reproduce?
fragmentation or alternation of generations
mosses use this to reproduce...
antheridium and archegonia
