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.