After gastrulation the next event in human
embryo formation is
a. formation of the bones.
b. formation of the neural tube.
c. the heart begins to beat.
d. pharyngeal arches form.
e. apotosis between fingers and toes begins.
B
You might also like to view...
Defensins act against bacteria and fungi by permeabilizing cell membranes.
Answer the following statement true (T) or false (F)
Which of the following cells is matched to an incorrect function?
A. eosinophil—important to the elimination of parasites B. mast cell—releases histamine C. macrophage—phagocytic cell D. neutrophil—important antigen presenting cell E. monocyte—precursor of macrophage
The ________ drift up to the stratosphere, where UV radiation causes them to break down to their atomic form, one of which breaks down ozone
Fill in the blank(s) with correct word
How many RNA codons encode 60 amino acids?
A. 180 B. 30 C. 20 D. 60