Plants Exam

The ancestors of land plants likely evolved from

• mosses that lived in the water

• an organism similar to green algae

• a protist that lived on land

• prokaryotes that carried on photosynthesis

Recent changes in the classification of the plant kingdom are based on

• studies comparing DNA sequences.

• comparison of physical structures.

• differences and similarities in life cycles.

• whether or not a plant uses seeds to reproduce.

What is the basic difference between a sporophyte and a gametophyte

• A sporophyte is a reproductive structure while a gametophyte is not.

• A sporophyte undergoes sexual reproduction while a gametophyte undergoes asexual reproduction.

• A sporophyte is the diploid phase while a gametophyte is the haploid phase of the plant life cycle.

• A sporophyte is much smaller than a gametophyte.

Which answer describes a reason that bryophytes need to live in moist areas?

• Bryophytes need the extra water for photosynthesis.

• the sperm of bryophytes need water to swim to the egg.

• gas exchange is more efficient in wet areas.

• without moisture, rhizoids cannot anchor the plants.

Water is carried upward from the roots to every part of the vascular plant by

• rhizoids

• phloem

• cuticle

• xylem.

seed-bearing plants differ from all other plants in that

• they have only xylem and no phloem

• they have a gametophyte generation

• their gametes do not require water for fertilization to occur

• they have true roots, stems, and leaves.

A student wants to determine whether or not the flower is pollinated by an animal, such as an insect or bird. Which property of the flower would be most useful for making this inference?

• number of stamens

• location of the style

• color and shape of the petals

• location and size of the ovary

In an experiment, Marlene removes the six anthers from the flower. What best describes the ability of the altered flower to form seeds?

• The flower cannot form seeds because it cannot be pollinated.

• the flower cannot form seeds because it cannot produce male gametophytes.

• the flower may form seeds because the stigma can produce pollen

• the flower may form seeds if it receives pollen made by another flower.

Vascular tissue allows a plant to transport water against the pull of gravity. Which statement best describes the trait of vascular tissue in the plant kingdom?

• All plants use vascular tissue to transport water.

• Most plants, but not mosses and other bryopytes, use vascular tissue to transport water.

• Only woody plants, such as trees and shrubs, use vascular tissue to transport water.

• Only herbaceous plants, such as grasses and garden vegetables, use vascular tissue to transport water.

The life cycle of a plant includes two alternating phases: a diploid (2N) phase and a haploid (N) phase. As plants evolved in many stages from green algae to seed plants, what trend occurred in the alternating phases?

• the haploid phase became larger.

• the diploid phase became larger.

• the two phases became more alike.

• the two phases each became smaller.