In this lesson our instructor talks about invertebrates. First she discusses porifera, cnidaria, platyhelminthes, rotifera, and nematoda. Then she talks about annelida, mollusca, echinodermata and arthropoda. She then lectures on selected characteristics of invertebrates. Four complete example videos round up this lesson.
Invertebrates are animals that
lack a backbone and spinal cord.
Major phyla of invertebrates
Porifera – Sponges are
sessile filter feeders that do not have a symmetrical body plan and
lack specialized tissues and organs.
Cnidaria - Includes jellies,
hydra, corals and sea anemones. Cnidaria have true tissues and
either polyp or medusa body plans. Their nervous system is composed
of a nerve net.
Platyhelminthes - Flatworms
have body plans that exhibit bilateral symmetry and cephalization.
Rotifera - Rotifers are
microscopic aquatic animals. They are filter feeders with a
pseudocoelem and a complete digestive tract.
Nematoda - Roundworms are
unsegmented worms with a complete GI tract.
Annelida - Annelids are
segmented worms such as earthworms and leeches. They have a ceolom
and a closed circulatory system as well as a complete GI tract.
Mollusca - Molluscs include
octopuses, chitons, squids, snails, slugs and clams. Molluscs have a
head-foot region, a visceral mass and a mantle.
Arthropoda - Arthropoda is the
largest phylum. Its members have segmented bodies with three
regions, a head, thorax and abdomen. They have an exoskeleton and
Echinodermata -Sea stars, sea
urchins and sand dollars are echinoderms. Members of this phylum are
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.