Apical dominance is the hormonal effect that inhibits lateral bud growth while plant resources are diverted to stem elongation. Through interactions with the environment , a flowering plant adjusts its growth patterns. Describe and give examples of phototropism, geotropism, and thigmotropism. Phytochrome serves as a switching mechanism in the biological clock governing photoperiodism. Low-temperature stimulation of flowering is called vernalization.
Senescence is the dropping of leaves, flowers, fruits, or other plant parts.
Know the characteristics of the various types of tissues. Know the types of cells that compose each tissue type and be able to cite some examples of organs that contain significant amounts of each tissue type. List the functions carried out by epithelial tissue and state the general location of each type. Explain the meaning of the term gland, cite three examples of glands, and state the extracellular products secreted by each. Describe the basic features of connective tissue, and explain how they enable connective tissue to carry out its various tasks.