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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
What is Hazard Identification Hazard Identification : The identification of known or potential health effects associated with a certain agent.
Darwins theory of natural selection is considered a paradigm shift--a theory that has wide-ranging effects. Describe some of the advantages that this theory offered scientists once
Using Autonomous Transactions The transaction is a sequence of SQL statements that does a logical unit of work. Frequently, one transaction starts the other. In several appl
Q. Can you define Regulation of Coronary Blood flow? During diastole when the aortic valve (AV) is closed, aortic diastolic pressure is transmitted through the dilated sinuses
Which of the following statements about how B and T cells recognize antigen are true? a. B cells only recognize antigen presented by class I or class II MHC molecules. b. Both cell
how can i explain the biphasic graph i get fom combination of two drugs?
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cherector and economic imoprtance of fungi snd algae
It is defined as the presence of chemicals and particulate in the atmosphere in quantities and pollution that are harmful to human health and environment. It occurs when the concen
Who was Charles Darwin? Charles Darwin was an English naturalist born in 1809 and considered the father of the theory of evolution. At the end of the year 1831, before turning 23
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