LIFE 103 EXAM 2 LOCKWOOD CSU WITH ALL CORRECT
& 100% VERIFIED ANSWERS|ALREADY GRADED A+
Flowers Correct answer-specialized structure for sexual reproduction, pollination by animals
(insects, mammals, birds) and wind
Seed Correct answer-consists of an embryo and nutrients surrounded by a protective coat.
Gametophytes of seed plants Correct answer-develop within the walls of spores that are retained
within tissues of the parent sporophyte
The ancestors of seed plants were most likely_____, while seed plants are ________. Correct
answer-homosporous; heterosporous
Ovule Correct answer-consists of a megasporangium, megaspore, and one or more protective
integuments (outside coating)
Megasporangium (Gymnosperm Female Anatomy) Correct answer-diploid tissue where haploid
megaspore is formed (meiosis)
Megaspore(Gymnosperm Female Anatomy) Correct answer-haploid cell that grows into female
gametophyte, including the egg nucleus
Microsporangium(Gymnosperm Male Anatomy) Correct answer-diploid tissue where haploid
microspores are formed (meiosis)
Microspores (Gymnosperm Male Anatomy) Correct answer-develop into male gametophyte
Pollen Correct answer-contains the male gametophyte within the tough pollen wall. Structure
influenced by dispersal methods, exterior composed largely of sporopollenin
Gymnosperm Fertilization Correct answer-Pollen released into the air, pollen grain reaches ovule
and germinates, pollen tube grows digesting through megasporangium, pollen tube reaches egg
nucleus and discharges sperm nucleus into egg nucleus of female gametophyte
Pollen Grains Correct answer-developed from microspores, which contain the male gametophytes
Pollination Correct answer-is the transfer of pollen to the part of a seed plant containing the ovules
Evolutionary Advantage of Seeds Correct answer-A seed develops from the whole ovule, a seed is a
sporophyte embryo, along with its food supply, packaged in a protective coat. A seed provides some
evolutionary advantages over spores: they remain dormant for days to years, until conditions are
favorable for germination. They maybe be transported long distances by wind or animals
The gymnosperms have naked seeds not enclosed by ovaries and consist of what 4 phyla? Correct
answer-Cycadophyta (Cycads), Gingkophyta(one living species: Ginko boloba), Gnetophyta (Three
genera Gnetum, Ephedra and Welwitschia), and Coniferophyta (conifers such as pine, fir and
redwood)
Phylum Cycadophyta Correct answer-individuals have large cones and palm like leaves
, Phlum Ginkgophyta Correct answer-phylum consists of a single living species, Ginkgo Biloba
Phylum Gnetophyta Correct answer-phylum comprised of three genera
The Carpel Correct answer-consists of an ovary at the base and a style leading up to a stigma,
where pollen is received.
The Female gametophyteor embryo sac Correct answer-develops within an ovule contained within
an ovary at the base of the stigma
The Stamen Correct answer-modified microsporophyll (sepals, pedals, stamen and carpels), male
part of the flower
Complete Flower Correct answer-has all modified leaves
Incomplete flower Correct answer-is missing one or more leaves
Perfect Flowers Correct answer-have both male and female parts
Selfing Plants Correct answer-Perfect flowers can theoretically self pollinate
The Life of a Pollen Correct answer-A pollen grain that has landed on a stigma germinates and the
pollen tube of the male gametophyte grows down to the ovary, the ovule is entered by a pore called
the micropyle. Double Fertilization occurs when the pollen tube discharges two sperm into the
female gametophyte within an ovule. One sperm fertilizes the egg, while the other combines with
two nuclei in the central cell of the female gametophyte and initiates development of food storing
endosperm, the endosperm nourishes the developing embryo
Cotyledons Correct answer-one or two seed leaves that exist within a seed embryo
Fruits Correct answer-A fruit typically consists of a mature ovary but can also include other flower
parts, fruits protect seeds and aid in their dispersal. Mature fruits can either be fleshy or dry
Dry Fruits Correct answer-Achene(dandelions, strawberries), Legume (pea, peanut, bean),
Samara(maple, ash, elm), Nut(acorn, beech, hazelnut), Fibrous Drupe(coconut, walnut)
Drupe Correct answer-contains fleshy exocarp and mesocarp
Influorescence (Multiple Fruits) Correct answer-cluster of flowers, each flower becomes a fruit, all
fruits merge into one mass
What are the two main groups of angiosperms? Correct answer-Monocots (one cotyledon) and
eudicots ("true dicots")
Basal Angiosperms Correct answer-are less derived and include the flowering plants abelonging to
the oldest lineages
Magnoliids Correct answer-share some traits with basal angiosperms but are more closely related
to monocots and edicts. Include magnolias, laurels and black pepper plants. Flower parts come in
multiples of 3 and often have parallel leaf veins
& 100% VERIFIED ANSWERS|ALREADY GRADED A+
Flowers Correct answer-specialized structure for sexual reproduction, pollination by animals
(insects, mammals, birds) and wind
Seed Correct answer-consists of an embryo and nutrients surrounded by a protective coat.
Gametophytes of seed plants Correct answer-develop within the walls of spores that are retained
within tissues of the parent sporophyte
The ancestors of seed plants were most likely_____, while seed plants are ________. Correct
answer-homosporous; heterosporous
Ovule Correct answer-consists of a megasporangium, megaspore, and one or more protective
integuments (outside coating)
Megasporangium (Gymnosperm Female Anatomy) Correct answer-diploid tissue where haploid
megaspore is formed (meiosis)
Megaspore(Gymnosperm Female Anatomy) Correct answer-haploid cell that grows into female
gametophyte, including the egg nucleus
Microsporangium(Gymnosperm Male Anatomy) Correct answer-diploid tissue where haploid
microspores are formed (meiosis)
Microspores (Gymnosperm Male Anatomy) Correct answer-develop into male gametophyte
Pollen Correct answer-contains the male gametophyte within the tough pollen wall. Structure
influenced by dispersal methods, exterior composed largely of sporopollenin
Gymnosperm Fertilization Correct answer-Pollen released into the air, pollen grain reaches ovule
and germinates, pollen tube grows digesting through megasporangium, pollen tube reaches egg
nucleus and discharges sperm nucleus into egg nucleus of female gametophyte
Pollen Grains Correct answer-developed from microspores, which contain the male gametophytes
Pollination Correct answer-is the transfer of pollen to the part of a seed plant containing the ovules
Evolutionary Advantage of Seeds Correct answer-A seed develops from the whole ovule, a seed is a
sporophyte embryo, along with its food supply, packaged in a protective coat. A seed provides some
evolutionary advantages over spores: they remain dormant for days to years, until conditions are
favorable for germination. They maybe be transported long distances by wind or animals
The gymnosperms have naked seeds not enclosed by ovaries and consist of what 4 phyla? Correct
answer-Cycadophyta (Cycads), Gingkophyta(one living species: Ginko boloba), Gnetophyta (Three
genera Gnetum, Ephedra and Welwitschia), and Coniferophyta (conifers such as pine, fir and
redwood)
Phylum Cycadophyta Correct answer-individuals have large cones and palm like leaves
, Phlum Ginkgophyta Correct answer-phylum consists of a single living species, Ginkgo Biloba
Phylum Gnetophyta Correct answer-phylum comprised of three genera
The Carpel Correct answer-consists of an ovary at the base and a style leading up to a stigma,
where pollen is received.
The Female gametophyteor embryo sac Correct answer-develops within an ovule contained within
an ovary at the base of the stigma
The Stamen Correct answer-modified microsporophyll (sepals, pedals, stamen and carpels), male
part of the flower
Complete Flower Correct answer-has all modified leaves
Incomplete flower Correct answer-is missing one or more leaves
Perfect Flowers Correct answer-have both male and female parts
Selfing Plants Correct answer-Perfect flowers can theoretically self pollinate
The Life of a Pollen Correct answer-A pollen grain that has landed on a stigma germinates and the
pollen tube of the male gametophyte grows down to the ovary, the ovule is entered by a pore called
the micropyle. Double Fertilization occurs when the pollen tube discharges two sperm into the
female gametophyte within an ovule. One sperm fertilizes the egg, while the other combines with
two nuclei in the central cell of the female gametophyte and initiates development of food storing
endosperm, the endosperm nourishes the developing embryo
Cotyledons Correct answer-one or two seed leaves that exist within a seed embryo
Fruits Correct answer-A fruit typically consists of a mature ovary but can also include other flower
parts, fruits protect seeds and aid in their dispersal. Mature fruits can either be fleshy or dry
Dry Fruits Correct answer-Achene(dandelions, strawberries), Legume (pea, peanut, bean),
Samara(maple, ash, elm), Nut(acorn, beech, hazelnut), Fibrous Drupe(coconut, walnut)
Drupe Correct answer-contains fleshy exocarp and mesocarp
Influorescence (Multiple Fruits) Correct answer-cluster of flowers, each flower becomes a fruit, all
fruits merge into one mass
What are the two main groups of angiosperms? Correct answer-Monocots (one cotyledon) and
eudicots ("true dicots")
Basal Angiosperms Correct answer-are less derived and include the flowering plants abelonging to
the oldest lineages
Magnoliids Correct answer-share some traits with basal angiosperms but are more closely related
to monocots and edicts. Include magnolias, laurels and black pepper plants. Flower parts come in
multiples of 3 and often have parallel leaf veins
