©EVERLY 2025 ALL RIGHTS RESERVED
Biology 152 Plant Unit Exam Questions And
Answers 100% Pass
What factors might have made it difficult for a lineage of algae to invade land? - ANS Cells
drying out, less physical support, sperm will have a hard time fertilizing eggs
What are the challenges of contesting land? - ANS Need to maintain water in cells, support,
sexual reproduction
What was the advantage to moving to land? - ANS Avoids competition for light
What traits do green algae share with land plants? - ANS Cellulose Cell wall, chlorophyll a &b,
two anterior flagella
What is a preadaptation? - ANS A trait that was already present and allowed a major
ecological transition
What are traits of the freshwater charophytes - ANS Often found growing at edges of small
ponds, shoreline of ponds change with rainfall, strong selective pressure to tolerate dry periods
What are 4 preadaptations of charophytes? - ANS Fresh water, spores, spores covered in
spuropollenin, can associate with mycorrhizal fungi which helps get nutrients
, ©EVERLY 2025 ALL RIGHTS RESERVED
What is sporopollenin? - ANS Most stable biopolymer known, decay resistant!, dehydration
resistant, uv protectant
What are mycorrhizal partners good for? - ANS Found in 400 MA fossils, essential fur
acquiring nutrients and for the step onto land
What are the major adaptations shared by all land plants? - ANS Cuticle, pores or stomata,
embryo
How many spores does a charophyte doing zygotic meiosis make for each fertilization event? -
ANS 4
What are the two generations? - ANS gametophyte and sporophyte
What is the gametophyte generation? - ANS haploid, produces gametes by mitosis
What is a sporophyte? - ANS Diploid, makes spores by meiosis
What is the embryo? - ANS A young sporophyte that is nourished by maternal tissue
Features of liverworts, mosses and hornworts in general - ANS Bryophytes, all very short,
tend to live in moist understories of forests, gametophyte is dominant life stage - the
sporophyte lives on gametophyte and is dependent on it for nourishment
Liverworts - ANS a nonvascular plant that's shaped like a human liver. found growing as a
thick crust on moist rocks or soil along the sides of a stream.,~ 9000 species, do not have
stomata- only pores
, ©EVERLY 2025 ALL RIGHTS RESERVED
Mosses - ANS 15000 species economically important especially in florist trade ' — soft, small,
green and nonvascular and are found on the ground near water, have stomata
Hornworts - ANS A small, herbaceous, nonvascular plant that is a member of the phylum
Anthocerophyta., only r 100 species, sporophyte long lived
Why did plants get taller? - ANS Being taller than competitors is important
In order to achieve great heights plants need to... - ANS Transport things with their bodies -
water to leaves, sugars made in leaves to all other cells (roots and stems)
True or false: spores, which are dispersed by wind, are dispersed further from greater heights -
ANS True
True or false: larger, branched sporophytes allow the plant to make more spores per
fertilization event - ANS True
True or false: gametophyte is constrained by the need for water (and lacks a vascular system) -
ANS True
True or false: sporophyte is haploid which exposes harmful mutations and eliminates them
from population - ANS False - they are diploid
Fern features - ANS - 12000 species, gametophyte phase and sporophyte phase grow
independently
Gymnosperms - ANS A plant that produces seeds that are exposed rather than seeds
enclosed in fruits
Biology 152 Plant Unit Exam Questions And
Answers 100% Pass
What factors might have made it difficult for a lineage of algae to invade land? - ANS Cells
drying out, less physical support, sperm will have a hard time fertilizing eggs
What are the challenges of contesting land? - ANS Need to maintain water in cells, support,
sexual reproduction
What was the advantage to moving to land? - ANS Avoids competition for light
What traits do green algae share with land plants? - ANS Cellulose Cell wall, chlorophyll a &b,
two anterior flagella
What is a preadaptation? - ANS A trait that was already present and allowed a major
ecological transition
What are traits of the freshwater charophytes - ANS Often found growing at edges of small
ponds, shoreline of ponds change with rainfall, strong selective pressure to tolerate dry periods
What are 4 preadaptations of charophytes? - ANS Fresh water, spores, spores covered in
spuropollenin, can associate with mycorrhizal fungi which helps get nutrients
, ©EVERLY 2025 ALL RIGHTS RESERVED
What is sporopollenin? - ANS Most stable biopolymer known, decay resistant!, dehydration
resistant, uv protectant
What are mycorrhizal partners good for? - ANS Found in 400 MA fossils, essential fur
acquiring nutrients and for the step onto land
What are the major adaptations shared by all land plants? - ANS Cuticle, pores or stomata,
embryo
How many spores does a charophyte doing zygotic meiosis make for each fertilization event? -
ANS 4
What are the two generations? - ANS gametophyte and sporophyte
What is the gametophyte generation? - ANS haploid, produces gametes by mitosis
What is a sporophyte? - ANS Diploid, makes spores by meiosis
What is the embryo? - ANS A young sporophyte that is nourished by maternal tissue
Features of liverworts, mosses and hornworts in general - ANS Bryophytes, all very short,
tend to live in moist understories of forests, gametophyte is dominant life stage - the
sporophyte lives on gametophyte and is dependent on it for nourishment
Liverworts - ANS a nonvascular plant that's shaped like a human liver. found growing as a
thick crust on moist rocks or soil along the sides of a stream.,~ 9000 species, do not have
stomata- only pores
, ©EVERLY 2025 ALL RIGHTS RESERVED
Mosses - ANS 15000 species economically important especially in florist trade ' — soft, small,
green and nonvascular and are found on the ground near water, have stomata
Hornworts - ANS A small, herbaceous, nonvascular plant that is a member of the phylum
Anthocerophyta., only r 100 species, sporophyte long lived
Why did plants get taller? - ANS Being taller than competitors is important
In order to achieve great heights plants need to... - ANS Transport things with their bodies -
water to leaves, sugars made in leaves to all other cells (roots and stems)
True or false: spores, which are dispersed by wind, are dispersed further from greater heights -
ANS True
True or false: larger, branched sporophytes allow the plant to make more spores per
fertilization event - ANS True
True or false: gametophyte is constrained by the need for water (and lacks a vascular system) -
ANS True
True or false: sporophyte is haploid which exposes harmful mutations and eliminates them
from population - ANS False - they are diploid
Fern features - ANS - 12000 species, gametophyte phase and sporophyte phase grow
independently
Gymnosperms - ANS A plant that produces seeds that are exposed rather than seeds
enclosed in fruits
