Bone replaces cartilage by which of the following processes?

# Bone replaces cartilage by which of the following processes? 

a. Interstitial growth

b. Endochondral development

c. Intramembranous bone formation

d. Membranous bone formation

The correct answer is: B. Endochondral development.

Interstitial growth is growth within the cartilage matrix by each cartilage cell enlarging

and forming matrix around each cell.

Bone replaces cartilage by a process termed endochondral bone development.

Intramembranous bone is formed when collagen fibers of connective tissue organize into closely knit meshwork, and this matrix gradually calcifies into bone.

Intramembranous bone formation is also known as membranous bone formation.

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The cerebral hemispheres develop from which of the following vesicles:

 # The cerebral hemispheres develop from which of the following vesicles? 

a. Forebrain

b. Midbrain

c. Hindbrain

d. Primary brain

The correct answer is a. Forebrain.

 The cerebral hemispheres develop from the forebrain vesicles.

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The first step of mitosis is:

 # The first step of mitosis is which of the following? 

a. Telophase

b. Metaphase

c. Prophase

d. Anaphase 

The correct answer is: C. Prophase.

Prophase is the first step of mitosis in which four structural changes occur.

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Melanoblastoma are derived from:

 # Melanoblastoma are derived from:

A. Basal epidermal cells

B. Neural crest cells

C. Prickle cells of epidermis

D. Somato pleuric mesoderm

The correct answer is B. Neural crest cells.

Melanoblastoma are derived from Neural crest cells.

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