BIO 102 Unit 4 Quiz

The embryo sac that forms within the ovule in a plant ovary forms from a

• haploid megaspore undergoing mitosis

• fertilized egg undergoing mitosis

• diploid egg undergoing meiosis

• haploid egg undergoing mitosis

• diploid megaspore mother cell undergoing mitosis

Asexual reproduction occurs in plants, in which the progeny produced are genetic clones to their parents. This is often achieved by the parent plant creating progeny from portions of its existing structure. From which of the following plant tissues are progeny NOT formed in asexually reproducing plants?

• shoots

• stems

• leaves

• roots

• flowers

Branches form on a plant when

• dormant meristem cells in the stem are stimulated by plant hormones

• the root mass becomes larger than a critical size

• too many leaves are clustered close together

• the plant stops its upward growth for the year

• the amount of available sunlight becomes too low to support photosynthesis

Which of the following mechanisms would NOT reduce inbreeding or genetic diversity in a species?

• separate male and female plants

• staggered maturation

• sprouting

• separate male and female flowers

• None of the above are correct

Some fruits are designed to be attractive food for animals. Other fruits that rely on animal dispersal are

• sticky or covered with clingy burrs
  

• buoyant in water

• explosive

• light and feathery

• tiny and dust-like

Which of the following is a common gardening practice?

• putting two plants of opposite genders near each other so they can reproduce sexually

• collecting seeds to fertilize plants the following year

• using genetically identical clones produced by a plant through asexual reproduction

• growing trees and shrubs by sexual reproduction

• transferring gametes from one plant to another

Seeds that are “designed” not to germinate, even under ideal environmental conditions are most likely to require

• stimulation by another plant of the same species.

• a certain amount of time to pass first (they have internal clocks).

• fertilization by another seed.

• bacterial infection to stimulate “germination genes.”

• passage through a bird gut or exposure to fire

In flowering plants, meiosis occurs

• in the ovule only.

• in the seed only.

• in the anther only.

• in the fruit only.

• in both the ovule and the anther.

The production of the plant hormone _________ plays a major role in _____________.

• auxin; programmed cell death

• cytokinin; stomatal opening

• ethylene; seed germination

• ethylene; leaf death

• cytokinin; fruit ripening

Which of the following growth characteristics of an arrowleaf plant matches the habitat in which it is planted?

• shallow water: long, ribbon-like leaves

• deep water: long, ribbon-like leaves

• shallow water: arrow-shaped leaves

• deep water: arrow-shaped leaves

• land: large, round leaves