If a plant's leaves are yellowing, it may be that the plant is deficient in the elements needed to make chlorophyll, one of which is __________.

Phytoremediation is showing promise as a sustainable, cost-effective way to decontaminate soil and water. In the case of a hyperaccumulater such as Thlaspi caerulescens, however, what might be a drawback of the technology?

The biological process that produces 96% of the dry mass of a plant is called __________.

Which of the following substances does a plant obtain from the air?

A botanist claims to have discovered a new macronutrient required for plant growth. Most of this scientist's colleagues are skeptical of her claim. Why might they consider it unlikely?

If a plant is deficient in __________, it will not be able to make DNA.

Soil could be deficient in any of the following nutrients. If you had to supply one of them, which would be needed in the smallest amount?

Which of the following is a true statement regarding mineral deficiency symptoms in plants?

When you add "plant food" to your potted geraniums, what are you actually providing the plant with?