mastering biology

Pollen

.All of these flower structures are modified EXCEPT

Via wind pollination

.Conifers do not have flowers to attract pollinators. Instead, fertilization occurs

Carpals

.Flowers that make only pollen lack

a pollen tube

.In flowering plants, the sperm does not have to swim to the egg. The sperm reaches the egg by

Pollen grain

.Which of the following is "male" in the life cycle of angiosperms?

When mature, the ovules will become seeds and the ovary will develop into a fruit

.Which of the following statements is true

Endosperm

Cotyledons, or ¨seed leaves,¨ absorb food molecules stored in the

These flowers attract pollinators that are animals

What is the evolutionary significance of a flower that has a large, brightly colored petals?

Anther

A flowering plant produces pollen in the

had damage to the apical meristem as the seedling emerged from the soil.

A group of geneticists exposed the seeds of a dicot plant to various levels of radiation in order to induce random mutations. Many of the irradiated seeds failed to germinate. Some of the seeds, however, germinated in the lab and were carefully studied. The scientist discovered a mutation that prevents the formation of a hypocotyl or epicotyl hook during germination

Has offspring that live in the same environment as the parents.

A plant, such as iris that reproduces asexually most of the time probably

Ovules

All of the following are included in the male parts of a flower EXCEPT

Lacks one or more of the four basic floral parts

An incomplete flower

Sporophyte

An oak tree is a

Central Cell

Based on the figure, the _____ must have contained two nuclei before fertilization

Complete dicot flower

Based on the green, leaflike sepals in the flower shown in the figure and on the other visible characteristics, this flower is a

It is a male tree with only male flowers that produce pollen, but no seed, and hence does not form fruit.

During a late-summer walk through a park, you notice a tree has remnants of many flowers but no fruits or seeds developing. There are no other trees like this one in the area. What could explain this occurrence

It provides nutrition for the developing embryo, therefore increasing survival rates.

Endosperm has allowed the angiosperms to become the most numerous and diverse plant group. What is the role of the endosperm?

Their sperm must swim to the egg

Ferns and mosses mainly live in moist environments and need water for sexual reproduction because

Gametophytes

If you see moss near the base of a tree in your yard, the green leafy moss plants are

Dominant gametophyte; dominant sporophyte

In general, plant evolution has moved from _____ to _____

The pines are responsible, because conifers are pollinated by wind and must produce enormous amounts of pollen in order to ensure that some of it reaches the female cones.

In north-central Florida, the cars, homes, streets, and ponds are covered with an impressive coating of bright yellow dust every spring. Upon closer, microscopic examination, the yellow dust turns out to be pollen grains. The area of Florida has pine trees, showy daytime-flowering plants, and often-unnoticed night time- flowering plants release pollen at the same time of year

Carpels; stamens

The American holly tree requires a ¨male¨ tree and a ¨female¨ tree to produce red berries in the winter this indicated that the male flowers lack ____ and the females flowers lack ___

It increases the evaporation of the scent, attracting pollinators from greater distances

The aptly named dead horse arum has a heat-producing flower. What advantage does this heat provide?

Stigma, style, and ovary

The female reproductive structure, the carpel, consists of

Cotyledons

The first leaves produced by an embryo while still inside the seed are

A filament that bears an anther

The male reproductive structure, the stamen, consists of

False

The process in flowering plant reproduction in which the first sperm unites with an egg to form a diploid zygote and the second sperm unites with two haploid polar bodies to form the diploid endosperm is called double fertilization.

Embryo

When wheat is processed to make white, all-purpose flour, the wheat is passed through rollers that pop off the embryo and the ovary wall. Some people add ¨Wheat germ¨ to the white flour used to make baked goods, in order to increase the protein content of these products. What is wheat germ?

Beetles

Which of the following pollinators would likely visit a flower that is relatively simple in design and smells like rotting carrion?

Water

While walking along a riverbank after a swim. You step on a sharp fruit. When you pick it up, you notice that it rattles which indicates there is an air pocket around the seeds. How is this fruit most likely dispersed?

Freeze them, then follow up with sufficient warmth and moisture

You have some freshly produced seeds that refuse to germinate when placed in moist soil. What can you do to break dormancy and encourage the seeds to germinate?

If the moths are exterminated by insecticides, the - interaction ceases and the plant will no longer be pollinated or reproduce

Yucca flowers are pollinated only by yucca moths, which lay their eggs in the flowers ovary. This interaction ensures that the plant has seed for the next plant generation and that the moth larvae have a food source to develop. What is a potential disadvantage or vulnerability of this very specialized plant-animal interaction?

Petals

___ are modified leaves that are often brightly colored and scented to attract pollinators

Sepals

___ are modified leaves that are often green and surround the flower bud