Extraembryonic membranes vertebrates
Justify that are the extraembryonic membranes similar in all vertebrates?
Expert
The presence of every extraembryonic membrane differs according to the vertebrate class. In fishes and amphibians just the yolk sac is present. In reptiles and birds apart from the yolk sac there are also amnion, chorion and allantois. In placental mammals besides all of these membranes, placenta is also present.
Repeated external stimulus is more attention -attracting than a single time. Repetition increases our sensitivity and alertness to the stimulus. Thus, greater the frequency with which a sensory stimulus is presented, the greater the chances we select it for attention.
Explain the ecological role of earthworms?
What is an instance of intra-specific competition?
Write about the circulatory system of the mammals?
Talk about the various parts that form the human respiratory system?
What is the function of fungi for several industries?
What are various illustrations of cnidarians? In which environments can such animals be found?
What do you mean by the immunoglobulins?
Core competence: "A core competency is an area of specialized expertise that is the result of harmonizing complex streams of technology and work activity." Core competencies are the majority important value generat
What is meant by the root cap?
18,76,764
1958623 Asked
3,689
Active Tutors
1434079
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!