Biology 1002 Chapter 45 Final Exam Spring 2017 LSU
________ results in the production of spores in flowering plants.
Meiosis
An incomplete flower
lacks one or more of the four basic floral parts.
A pollen grain is actually the
male gametophyte.
Meiosis produces a ________, which eventually gives rise to an egg in an unfertilized seed.
megaspore
All of these flower structures are modified leaves EXCEPT petals. carpels. sepals. stamens. pollen.
pollen.
The sporophyte produces
spores by meiosis.
An oak tree is a
sporophyte.
The sexual life cycle of plants is described as alternation of generations because it alternates between
sporophytes and gametophytes.
A plant, such as an iris, that reproduces asexually most of the time probably
has offspring that live in the same environment as the parent.
In the alternation of generations, what is formed when a spore germinates?
A haploid stage called the gametophyte.
________ are modified leaves that are often brightly colored and scented to attract pollinators.
Petals
Spores and gametes are both haploid reproductive cells. What is the difference between the two?
Spores germinate and grow into a multicellular haploid gametophyte, and gametes fuse to form a diploid zygote.
Grass flowers lack petals and sepals. Which of the following statements is TRUE?
They are incomplete flowers lacking one or more floral parts.
What are the results of double fertilization?
Triploid endosperm and diploid zygote
Is the following statement TRUE? When mature, the ovules will become seeds and the ovary will develop into a fruit.
Yes
In flowering plants, the sperm does not have to swim to the egg. The sperm reaches the eggs by
a pollen tube.
A flowering plant produces pollen in the
anther.
Flowers that make pollen, but not ovules, lack
carpels.
The first leaves produced by an embryo while still inside the seed are
cotyledons.
All of the following are included in the male parts of a flower EXCEPT
ovules.
Conifers do not have flowers to attract pollinators. Instead, fertilization occurs
via wind pollination.