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What is the system that permits movement and fixation to echinoderms?
The system that allows movement and fixation to substrates in echinoderms is known as the ambulacral system. In these animals water enters by a structure called madreporite, passes by channels and reaches the ambulacral feet in the undersurface of the body. In the ambulacral region in contact with the substrate, there are tube feet filled and emptied by water therefore acting as suckers
Composition The present day composition of atmosphere is the product of a lengthy evolutionary process that began more than four billion years ago. It is composed of a mixture
A 21-year-old woman presents with a 3-month history of malaise, joint pain, weight loss, and sporadic fever. Her temperature is 38°C (101°F). The serum antinuclear antibody (ANA) t
Briefly explain Lichens organism? Lichens are unique organisms consisting of a symbiotic relationship between a fungus and a photosynthetic organism. They represent a type of s
What types of individuals in a population are represented by the two ends of a bell curve?
State the Disorders of sleep The need for sleep varies considerably from one person to another, as well as in the same person at different stages of life. We have all been told
Which of the following serves as an actuating signal, or as part of an actuating signal, in a positive feedback system? A. Blood plasma levels of PTH (Parathryroid Hormone).
Q. Describe Cultural Characteristics of Microorganisms? Bacterial growth in and on foods often is extensive enough to make the food unattractive in appearance or otherwise obj
Proteins - classification, composition and biological functions Proteins, as you may already know, are made up of carbon, hydrogen, nitrogen, oxygen and usually sulphur. Prot
Define the Food Sources of Thiamin? Thiamin is present in many food products and depending on the amount of vitamin present, we have categorized the foods as rich, good or fair
Effects on Materials - Air pollutants Most air pollutants are reactive chemicals, so they react with most of the substances around. You may recall from your chemistry lessons
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