Answer:
water-vascular system
Explanation:
Echinoderms exhibit several unique features and the presence of a water vascular system is one of them. The water vascular system of these organisms consists of a network of fluid-filled canals and chambers. The marine water enters and exits the system through an opening. This system functions as a hydrostatic skeleton during locomotion.
Tube feet of these organisms are filled with fluid as water enters into them via the canals of the water vascular system lead to them. This inflates the tube feet and serve in locomotion. The water entering through the water vascular system also brings in dissolved oxygen and food particles into the body.
Answer:
Hydrogen bonds
Explanation:
DNA is a double helical structure that means two nucleotide chains are bonded together. The bonds through which two nucleotide chains are held together are known as hydrogen bonds. DNA is made up of four types of nucleotides named as adenine (A), thiamine (T), cytosine (C) and guanine (G). Out of these four, adenine is complimentary to thiamine and if adenine is present in one nucleotide chain then it bonds with thiamine of other nucleotide chain with the help of two hydrogen bonds while cytosine is complimentary to guanine and bonds with guanine of other nucleotide chain with the help of three hydrogen bonds.
Explanation:
Lysosomes are to damaged organelles, as garbage collectors are to garbage.
Answer:
A blood stem cell transplant is used to treat patients with: multiple myeloma,lukemia and even anaemia.
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