Q. Isotope, Natural Abundance, and  spin (I) are given, and some statement are made

a. 12C=98.9%=NMR-active

b. 16O=99.9%=NMR-active

c. 12C=98.9%=NMR-inactive

d. 16O=98.9%=NMR-inactive

Which of the following is true

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#Question id: 7000

#Unit 5. Developmental Biology

One primary factor in shaping the polarity of the body axes in chick embryos is ________.

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#Question id: 7001

#Unit 5. Developmental Biology

If the apical ectodermal ridge is surgically removed from an embryo, it will lose ________.

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#Question id: 7002

#Unit 5. Developmental Biology

The nematode Caenorhabditis elegans ________.

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#Question id: 7003

#Unit 5. Developmental Biology

What structural adaptation in chickens allows them to lay their eggs in arid environments rather than in water?

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#Question id: 7004

#Unit 5. Developmental Biology

Between fertilization and the first cleavage division, actin filaments pull the cytoplasm of the frog egg toward the point of sperm entry in a process called:

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#Question id: 7005

#Unit 5. Developmental Biology

The primitive streak in a bird is the functional equivalent of :