Leaves are part of a plant’s shoot system. The xylem tissue in leaves transports —

Copper is a micronutrient that can be found in soil. Copper is important for reproductive growth in plants and plays an indirect role in chlorophyll production. Which statement correctly describes the interaction that occurs between the root and the shoot systems of plants to allow reproduction to occur?

The outermost layer of plant stems in dicotyledons consists of epidermal cells and guard cells that surround openings called stomata. The epidermal cells are usually covered with a waterproof layer that provides protection from injury and water loss. The stomata allow gas exchange. The epidermal cells and stomata have functions similar to those of which two human body systems?

Cytokinins are a class of plant hormones that help regulate growth by promoting cell division. Cytokinins are produced mainly in meristematic tissue, where most plant growth occurs. Which system carries cytokinins produced in the roots to the rest of the plant?

Fruits grown in hot climates are usually less sweet than those grown in cooler temperatures. The high temperatures increase the rate of respiration in the plants, thus reducing the sugar content in some fruits. Why does increased respiration in the leaves and stems reduce the sugar content in the fruits of a plant?

Which of the following structures is an opening on the underside of a leaf that is necessary for gas exchange?

Climbing plants, such as ivy, respond to physical contact with objects. Many of these plants grow tendrils that coil around the objects they touch. When these plants respond to touch, they exhibit

What are joint legged animals?

Which animals lack true tissue?

A fruit is most commonly

Plant diversity is greatest in

Gymnosperms and angiosperms have the following in common except:

Which of the following features does not distinguish humans as a member of phylum Chordata?

As with the emergence of the Acoelomorpha phylum, it is common for ____ data to misplace animals in close relation to other species, whereas ____ data often reveals a different and more accurate evolutionary relationship.

Crustaceans are _____.

The embryonic development in nematodes can have up to __________ larval stages.

Which of the following phenotypes would most likely be the result of a Hox gene mutation?

Wind causes a potted plant on a patio to fall over. In a few days, phototropism causes the plant's stem to begin growing upward. To what external stimulus is the stem responding?

Which plant hormones are most responsible for controlling plant height?

Which response does not support the need for the international science community to have a standardized taxonomic system?

Gymnosperms and angiosperms have the following in common except: