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Q What is the system that permits fixation and movement to echinoderms?
The system that permits fixation and movement to substrates in echinoderms is called the ambulacral system. In these animals water enters through a structure called madreporite passes through 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 emptied and filled by water thus acting as suckers.
Define Precautions - Estimation of Nitrogen and Protein Content? 1. The apparatus should be airtight to prevent leakage of NH 3 . 2. The tip of the delivery tube should be i
A study of broken rock Break open several rock specimens. Compare the appearance of freshly broken surfaces with the Heather-worn outside of the rock. The rocks may be safely b
Q. Which Of the substances is chromatin made? Chromatin is made of the DNA molecules associated to proteins known as histones.
Concerning reproduction what is the function of the testicles? The testicles are the male gonads, i.e., the organs where the production of gametes takes place. In human beings
Assessment You can observe it visually at birth. The anterior abdominal wall is absent and the posterior bladder lining which is bright red in colour is exposed. Urine seeps
Atmosphere is a multilayer blanket of various gases such as N2 (78.80%), O2 (20.95%), Ar(0.93%), CO2 (0.03%), water vapor and some other gases. This envelope extends from earth's c
Q. What are the main causes of the loss of biological diversity nowadays? The largest dangers to the biological diversity today are the action of humans. The major of them is t
Determine the Occurrence of vitamin A In the vegetable kingdom, vitamin A probably occurs in the form of its provitamins which belong to the group of carotenes. Carrots, spina
Q. Basic principles of planning diets for diabetes? The above objectives can be met by adhering to some of the basic principles of planning diets which include the consideratio
how does sodium and potassium ions maintain the resting petential of neurons
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