Key Concepts Quiz

This activity contains 15 questions.

	I have just finished landscaping my yard and have a rather large area of exposed soil. Which group of plants should I plant in order to minimize erosion?   monocots dicots Either monocots or dicots would work in this situation. You would want to mulch the area and worry about planting later.

	How does plant growth change if the terminal bud is removed or its growth is otherwise hindered?   The plant quickly flowers in an attempt to reproduce. Growth of axillary buds is stimulated so the plant grows outward instead of just upward. New leaves appear on internodes. Growth of axillary buds is inhibited.

	You have just collected a plant with a large, underground structure. How can you tell if it is a modified shoot or a root?   Green color would denote the presence of chlorophyll, indicating that this is a shoot. All underground plant parts are considered to be part of the root system. Use a simple test to look for accumulated starch in the internal tissues. Look for either buds or root hairs.

	Under ideal environmental conditions, a plant has produced much more carbohydrate than it needs to survive. Where will this surplus likely go in the plant body?   epidermal tissue vascular tissue endodermal tissue ground tissue

	Which of the following plant cell types have a role similar to that of bone cells in animals?   parenchyma cells sclerenchyma cells collenchyma cells sieve-tube members

	Vessel elements are dead cells that are part of _____ and conduct _____ through hollow tubes.   phloem … water xylem … water sieve-tube members … sugar xylem … sugar

	The meristems of plants allow for indeterminate growth in plants. What cell type must be found in the meristematic region for this to occur?   sclereids collenchyma parenchyma sclerenchyma

	What is the basic difference between primary and secondary growth?   Primary growth is via meristems, whereas secondary growth is not confined to one location. All plants exhibit primary growth, but not all plants exhibit secondary growth. Primary growth is confined to the root system, whereas both primary and secondary growth occur in shoots. Once secondary growth is initiated, primary growth ceases; thus, you will never have both primary and secondary growth taking place in a single plant.

	The vascular cambium of a woody tree can be found just outside the _____.   cork cambium bark sapwood heartwood

	Why would an angiosperm plant expend the energy to produce pollen grains with the sperm cells encapsulated inside?   to protect the sperm cell to provide nutrition for the sperm cell to provide nutrients for the egg once pollination has occurred to provide a way to get the sperm to the egg in the absence of liquid water

	Why do angiosperms expend great amounts of energy to produce a seed when seedless plants were so successful?   This is a way to allocate excess metabolites. The seed houses a completely developed plant. The seed is lighter and easier to disperse when compared to fern or bryophyte spores. The seed contains an embryonic plant and a food source for its development in one compact, hardy structure.

	I have just picked a red, ripe, juicy tomato, and I want to plant the seeds. I quickly remove the seeds and plant them while they are still damp with some of the remains of the fruit. I just know they will quickly germinate and grow to produce new tomato plants. I keep the soil moist, and to my dismay, I still have no tomatoes after waiting a year. What do you think has happened?   The seeds were not fully developed. Something in the fruit hinders seed germination. The seeds needed more water than the fruit pulp provided. The chances of any seeds from one fruit germinating are too slim.

	A fruit such as a nectarine is most likely a(n) _____ because _____.   aggregate fruit … it results from a single flower that has more than one carpel multiple fruit … it develops from a group of flowers tightly clustered together simple fruit … it develops similarly to a walnut simple fruit … its fleshiness appeals to seed disseminators

	In some biomes (types of ecosystems), frequent fires destroy plant life, but it is quickly replaced with new growth. The intense heat must stimulate enzymes in seeds that _____.   begin development of the embryo begin a period of dormancy break dormancy self-destruct

	Tim discovers a large group of cane plants (sometimes referred to as bamboo). He notices that all of the plants look very similar (after all, they are all cane). He also observes that the population seems to form a tight group of individual plants that seem to radiate from a central core. What is the likely mode of reproduction in this population?   asexual reproduction sexual reproduction It is not reproduction; cane grows as a series of upright stems from a single seed. Since the population appears to radiate from a central core, they must have grown from a bunch of seeds dropped at the same time. This is not an example of continued reproduction, but a random grouping of seeds that germinated.

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