Exam 28: The Life of a Flowering Plant

Use this figure to answer the questions. -Examine the figure. What process occurs in the cork cambium?

What is a function of roots?

Scenario The North American beaver is a large rodent that builds dams to convert freshwater streams into ponds. Beavers build their dams out of trees, which they cut down using their front teeth. Beavers also eat the leaves and bark of trees, as well as the starchy roots of water lilies. -Beavers dams are sturdy, because the part of a tree that provides structural support when the tree is alive lends its strength to the dam, even after the tree is dead. What part of a tree provides this structural support?

While on a hike, you notice that several burrs have become attached to your socks. You quickly pull them off. Inside the burr are several seeds. Burrs are produced by certain plants and frequently catch on animal fur (or people's clothing). After thinking about it, you decide that the burr is a type of ________ that is an adaptation for ________.

You trim two different houseplants. The first houseplant becomes bushier, but the pruning does not affect the growth of the second plant. A possible explanation is ________.

Where are leaves attached to a stem?

Read the following scenario to answer the questions. The pineapple, grown for its sweet fruit, is a tropical monocot with a diploid number of 50. It can live for many years. The plant starts as one short stem with tough leaves. The flowers of the pineapple are located as a cluster at the very top of the stem. After pollination, the single fruit forms from the fusion of the ovaries of the flowers in the cluster. The seeds are located just underneath the surface of the fruit. The pineapple fruit is harvested by cutting at the base of the fruit. After the first fruit is produced, side shoots grow from the main stem, which can go on to produce additional fruits. -The first pineapple on a plant develops from ________, whereas the pineapples from the second harvest of the same plant develop from ________.

he width of tree rings provides insights into the environmental conditions experienced by a tree in the past. A way of sampling tree rings without cutting down a tree involves drilling out a narrow cylinder of wood from just beneath the bark to the center of a tree. The image below shows two samples of Picea abies (Norway spruce). The bark of the trees is on the left side, and the center of the trees is on the right, but off the photo. Examine this image to answer the questions. -The amount of growth in a season depends on climate conditions. Examine the image, and interpret the pattern of tree growth to estimate the conditions recorded in these trees.

Scenario The North American beaver is a large rodent that builds dams to convert freshwater streams into ponds. Beavers build their dams out of trees, which they cut down using their front teeth. Beavers also eat the leaves and bark of trees, as well as the starchy roots of water lilies. -As a beaver chews from the outside to the inside of a tree, in what order does it encounter plant tissues?

What is responsible for the increase in girth (width)of trees?

Flowering plants reproduce through ________.

What has thick secondary cell walls usually strengthened with lignin?

Scenario A renewable alternative to fossil fuels are biofuels. Scientists are searching for the best plants to use as a source of biofuels. Plant sugars can be fermented into ethanol, and then used as an additive to gasoline. Although it is relatively easy to obtain ethanol in this way, this type of ethanol production competes with the need to produce food. Alternatively, biofuels can be fermented from other plant carbohydrates, such as the cellulose in plant cell walls. This is called cellulosic ethanol production. -Cellulases are enzymes that are used to break down cellulose. What type of cell would have cell walls that take the LONGEST for cellulases to break down?

What do guard cells act to regulate?

What cell type provides support in growing parts of a plant?

Scenario In late 2006, bee workers in the United States started to notice a disturbing phenomenon: the sudden disappearance of honeybees from commercial hives. This mysterious condition was called "colony collapse disorder," and it has caused a drastic reduction in commercial honeybee populations all over the country. It is estimated that one-third of our food supply relies on bees and is in danger. Crops that rely most heavily on honeybees include apples, almonds, blueberries, and pumpkins. If colony collapse disorder cannot be cured or treated effectively, farmers may have to turn to other insects, perhaps other bee species or even moths. -Without honeybees, which process in the life cycle of plants such as apples, almonds, blueberries, and pumpkins is most affected?

The eudicots are characterized by ________.

Describe the vascular system of a typical plant.

What structure is a stem modification for storage?

The multicellular mass that nourishes the embryo until it becomes a self-supporting seedling is the ________.