Spina bifida and anencephaly are examples of neural tube defects. Women who have had a pregnancy resulting in the birth of an infant with a neural tube defect are being urged to take supplements of before a second conception to decrease the risk of these birth defects.

folic acid

Explanation:

Spina bifida and anencephaly are examples of neural tube defects. Women who have had a pregnancy resulting in the birth of an infant with a neural tube defect are being urged to take supplements of folic acid before a second conception to decrease the risk of these birth defects.

Neural tube defects are congenital defects associated with the brain and the spinal cord in which the brain and the skull of the fetus refuse to develop (anencephaly) or the spinal cord refuses to close up as it should (spina bifida).

Neural tube defects has been found to be preventable by adequate consumption of folic acid before and during pregnancies.

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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