​Having a Deficiency of Which Nutrients Has Been Implicated in Increased

question 27

Multiple Choice

​Having a deficiency of which nutrients has been implicated in increased blood levels of homocysteine in the elderly?

• A) ​vitamin B₁₂,folate,and iron
• B) ​vitamin B₁₂,vitamin B₆,and folate
• C) ​calcium,vitamin D,and vitamin B₁₂
• D) ​all the B vitamins and vitamin C
• E) ​fat-soluble vitamins only (A,D,E,K)

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Definitions:

Hydrostatic Skeleton

A type of skeleton found in some invertebrates in which contracting muscles push against a tube of fluid.

Asexual Reproduction

The process by which an organism creates a genetically identical copy of itself without the involvement of another organism.

Choanoflagellates

A group of free-living unicellular and colonial flagellate eukaryotes considered to be the closest living relatives of the animals.

Collar Cells

Also known as choanocytes, are flagellated cells that line the interior of asconoid sponges and are used for feeding by generating water flow and filtering food particles.