In this lesson our instructor talks about plant structure. First she discusses plant tissues, cell types in plants, xylem, phloem, roots and the nitrogen cycle. Second, she talks about mycorrhizae, stems, leaves, and stomata. Afterward, she lectures in detail about primary and secondary plant growth. Four complete example videos round up this lesson.
Roots anchor the plant to the
ground. They are also the site of absorption of water and minerals
from the soil and a site of food storage.
The leaf is the primary site of
photosynthesis in most plants. The outer layer of the leaf is
covered with a cuticle to prevent the loss of water. The cells of
the mesophyll contain numerous chloroplasts where photosynthesis
Stomata are pores on the
surface of leaves that allow for gas exchange. Guard cells flanking
a stoma change shape in order to control the opening and closing of
The xylem conducts water and
minerals from the roots to the rest of the plant. The xylem is
composed of tracheids and vessel elements arranged in chains.
The phloem conducts nutrients
from sites of production to the rest of the plant. Companion cells
associated with the sieve-tube elements regulate the flow of
Plants can grow indefinitely
due to the undifferentiated, embryonic cells in their meristems.
Primary growth increases the length of the plant. Non-herbaceous
plants also undergo secondary growth, which results in an increase
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
The book and CD package include three full length practice exams that are presented with all questions answered and explained. The author also presents detailed reviews of all test topics and includes multiple-choice and free-response questions with answers at the end of each topic's chapter.
This book has a great topic-by topic breakdown of the 14 must-know principles with sample questions and answers for each of the subjects. Laboratory Review includes a focused review of all 12 AP laboratory exercises. Included in this is 2 full length practice tests that stimulate the actual test along with answers and complete explanations.
This book includes a comprehensive biology test topic review, covering everything from photosynthesis to genetics to evolution. Cracking the AP Biology also includes testing strategies for the grid-in and essay section, great guidance on writing a high-scoring essay, and two full length practice exams with detailed explanations.