Exam 29: The Working Plant

Which one of the following is a plant micronutrient?

A scientist finds seeds of an unknown plant on top of the soil in a desert.She measures the concentration of two hormones in these seeds.After it rains,she collects more of these seeds,and finds that the concentration of the two hormones has changed.A graph of her results is shown above.Identify the most likely hormones measured by the scientist.

For a plant,carbon and nitrogen are ________.

Oats are eaten by humans as oatmeal or rolled oats,and as feed for livestock such as cattle.In order for an oat plant to make the part we eat (the seed),it must flower and be pollinated.Typically,oat plants flower when days are lengthening (i.e.,late spring to early summer).What is the best classification for oat plants?

Which of the following best describes substances that enter a plant through the root system?

Most plants rely on bacteria to supply them with a usable form of which of the following substances?

Which of the following hormones promotes cell elongation in stems?

Which of the following hormones promotes seed germination?

Which of the following describes a chemical element that a plant must obtain from its environment in order to complete its life cycle?

Some farmers practice crop rotation,alternating between planting nonlegumes such as corn or wheat one year and legumes the next year.What is the advantage of crop rotation?

Examine the figure below.Which of the following is the site of carbon dioxide uptake by a plant?

Which of the following convert soil ammonium to nitrate?

Which of the following best describes the role of plant root nodules in plants such as peas and beans?

Transpiration pulls water up a plant because of two mechanisms: ________ describes water molecules sticking together and ________ describes water molecules sticking to the walls of the xylem.

Examine the figure below.When considering the shaded side of a grass shoot,which of the following best describes why it bends toward the light?

Which of the following best describes the opening and closing of the stomata in most plants?

The three most important nutrients contained in fertilizers are ________.

Considering the experiments of the Darwins,Boysen-Jensen,Paal,and Went,what do you conclude about phototropism?

Across the globe,billions of people eat rice.In order to make rice grains (the seed),a rice plant must flower and be pollinated.Rice plants flower only after days become shorter (i.e.,summer to autumn).What is the best classification for rice?

Which of the following supplies water and minerals to a typical plant?