What is formed by closure of neural groove?
A. mesonephros
B. mandibular processes
C. neural tube
D. secondary palate
E. somites
C
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The darkly pigmented, highly vascular layer of the eyeball that lies behind the retina is the ________.
What will be an ideal response?
Complete this analogy: Testes are to gonads as sperm are to:
A) ova. B) sex hormones. C) estrogen. D) gametes.
The hepatic portal system
A. transports nutrients from the digestive tract to the liver. B. has no pumping mechanism between the capillary beds. C. allows the liver to detoxify substances entering the body through the digestive tract. D. begins and ends with capillary beds. E. All of the choices are correct.
What does enzyme specificity mean?
A) Enzymes do not change or degrade after a reaction. B) An enzyme is able to speed up several different chemical reactions C) Enzymes can only bind to one type or shape of substrate . D) Enzymes require a specific temperature and pH for optimum activity