Which of the following mechanisms best explains how xylem sap moves up against the downward pull of gravity?

Movement of xylem sap from roots to leaves

________ is to xylem as ________ is to phloem.

Which of the following is the most likely plant response to an attack by herbivores?

Which of the following is TRUE about vegetative reproduction?

Gas exchange, which is necessary for photosynthesis, can occur most easily in which leaf tissue?

Which of the following is an example of flowering plant/animal interdependence?

Which of the following is (are) TRUE in plants? I. Mitosis occurs in gametophytes to produce gametes.II. Meiosis occurs in sporophytes to produce spores.III. The gametophyte is within the flower in angiosperms.

The driving force that pushes the root tip through the soil is primarily

The ______ enclose and protect the flower bud, while the ______ advertise the flower to insects and other pollinators.