Botany: where did peanuts originate?

Thinking about common foods can lead to self-tutoring. The tutor shares his find about where peanuts originate.

peanut origin

Peanuts originate from South America. Likely they were first domesticated in Bolivia or Argentina. The Portuguese, who colonized Brazil, brought peanuts to be cultivated in Africa.

Source:

www.fs.fed.us

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Biology: what is GMO?

Tutoring biology, everyday questions surface. The tutor shares the meaning of GMO.

GMO (noun): Genetically Modified Organism

An organism whose DNA contains sequences from more than one species. Although this individual may have arisen by natural reproduction, either it, or one of its ancestors, had its DNA altered by scientifically developed means.

Source:

gmo-awareness.com

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Cholesterol: hdl vs ldl

More lifestyle tutoring: the tutor continues to research cholesterol.

Perhaps many of us have heard that HDL is the “good” cholesterol, while LDL is the “bad”. What’s the difference?

HDL: collects cholesterol from the blood and conveys it to the liver, where it will be cleansed from the body.

LDL: conveys cholesterol to an artery, where it may be deposited to form plaque. As a result, the artery wall thickens, while its room for blood passage decreases.

Source:

www.heart.org

www.healthline.com

www.cdc.gov

www.heart.org

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Biology: what is a basement membrane?

Tutoring biology, terminology is so important. The tutor gives a definition of the term basement membrane.

basement membrane: a boundary layer that fastens overlying epithelial tissue to connective tissue beneath. The basement membrane comprises glycoprotein from the epithelial tissue, with collagen fibres from the connective tissue.
A basement membrane backs the lining of the intestine, for instance.

Source:

Mader, Sylvia S. Inquiry into Life, 11th ed. Toronto: McGraw-Hill, 2006.

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Nutrition: what does vitamin K do?

More lifestyle self-tutoring: the tutor shares a few facts about vitamin K.

I didn’t hear much about vitamin K as a kid. It can be found in multivitamins and I notice it in literature.

Vitamin K is fat-soluble. It promotes proper blood clotting and also helps movement of calcium.

Vitamin K deficiency is uncommon among people who eat a healthful diet.

Source:

nih.gov

www.drweil.com

www.mayoclinic.org

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Biology, composting: immobilization vs mineralization

Organic groundskeeping leads to self-tutoring. The tutor defines two terms connected with composting.

In a properly functioning ecosystem, nutrients are constantly recycled – they are used by one organism, then released back to the soil to be retaken by another.

Immobilisation is the temporary possession of a nutrient by an organism (typically not a plant, but rather a decomposer). The decomposer needs the nutrient for its own life process. While the decomposer is alive, the nutrient it contains is unavailable to the surrounding plants.

Mineralization is release of nutrients to the environment. Now they are available to plants.

The eventual result of decomposition is mineralization. During decomposition, however, immobilization may happen.

Source:

www.knowledgebank.irri.org

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Biology, chemistry: the difference between cellulose and lignin

Tutoring biology, you deal with organic molecules. The tutor mentions the difference between lignin and cellulose.

Cellulose and lignin are both found in cell walls.

Cellulose is composed of many glucose units bonded together.

Lignin, on the other hand, consists of phenyl propane units bonded together.

Therefore, cellulose is a polysaccaride, or starch, whereas lignin is aromatic.

Source:

Mader, Sylvia S. Inquiry into Life, 9th ed. Toronto: McGraw-Hill, 2000.

www.icfar.ca

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Tree identification: amur corktree (Phellodendron amurence)

Tree identification leads to more self-tutoring. The tutor mentions a find of an amur corktree in Victoria.

Nowhere seems better than Victoria to find particular trees. Down there last weekend, I had very little opportunity to tree-hunt. Yet, a few caught my eye.

The amur corktree features compound leaves with black berries; I know no other tree with that combination.

It’s my impression that, near Craigdarroch Castle, I saw at least one such tree.

Source:

trees.umn.edu

landscapeontario.ca

baltimore.picturesofus.net

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Tree identification: ginkgo biloba

Tree identification leads to self-tutoring. The tutor shares a find from Victoria.

Down in Victoria the weekend, I noticed a tree with fan-shaped leaves. I believe I saw one or more right downtown, around the Government/Yates area.

I suppose the tree is the ginkgo biloba. Apparently it’s a common ornamental in North America. The ones in Vic are the first I’ve seen.

Source:

Eslkevin’s Blog

Brockman, Merrilees, and Zim. Trees of North America: A field guide to identification. New York: Golden Press, 1968.

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Biology: what is the most contagious disease among humans?

Tutoring biology, diseases are mentioned. The tutor names perhaps the most contagious one.

Measles is potentially the most contagious disease among humans. In particular, all children in a natural, unvaccinated population will catch it.1

When I was a kid, I heard about measles, but didn’t catch it. I believe I was immunized against it at some point. I never hear about it now, likely because children are typically vaccinated.

Measles can be fatal, by complication to pneumonia or swelling of the brain.

Source:

1Mader, Sylvia S. Inquiry into Life, 11th ed. Toronto: McGraw Hill, 2006.

www.npr.org

www.canada.ca/en/public-health/services/diseases/measles

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.