What is the name of the point at which the chromatids are attached in a chromosome?
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___ are the carriers of heredity material.
T cell activation requires
The instrument used to examine a person's digestive tract is called ___.
The skin, the lining of the mouth, the lining of the blood vessels, lung alveoli and kidney tubules are all made of which type of tissue?
Slow-growing large coloured patches on the bark of trees are the examples of symbiotic life forms called ______.
Which of the following organ does NOT belong to human excretory system?
____ forms a common passage for both urine and sperms in human males.