45) _______Which of the following tissues are derivatives of the mesoderm? (1) f

Question

45) _______Which of the following tissues are derivatives of the mesoderm? (1) floor plate of the neural tube, (2) muscle, (3) intestinal epithelium, (4) connective tissue of the dermis, or (5) somites

   a) 1, 2 and 4

   b) 2, 4 and 5

   c) 2 and 3

   d) 1 and 5

   e) 3 and 5

46) _______Which of the following statements about HOX genes are true? (1) they function by having overlapping domains of expression, (2) they function in both limb development and limb regeneration, (3) they code for transcription factors, (4) they control the pattern of floral development in plants or (5) they are homeotic genes

   a) 1, 2, 4 and 5

   b) 2, 3, 4 and 5

   c) 3 and 5

   d) 2, 3 and 4

   e) 1, 2, 3 and 5

47) _______What is the correct temporal sequence of the following developmental stages? (1) zygote, (2) gastrula, (3) neurula, (4) blastula, (5) gamete, and (6) larva

   a) 5, 1, 4, 2, 3 and 6

   b) 1, 4, 5, 2, 3 and 6

   c) 6, 4, 2, 3, 5 and 1

   d) 5, 4, 2, 3, 5 and 6

   e) 1, 6, 5, 4, 3 and 2

Explanation / Answer

45) B (2, 4 and 5)

46) e ( 1, 2, 3 and 5)

47) a ( 5, 1, 4, 2, 3 and 6)

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