Hi I'm confused on what is an stem extender and morphemes.

Underline any stem extenders in the word below.
Philosophy
Banana
Pheumectomy
Anthropology

How many morphemes do the following contain?
Sown 1
Airsickness 2?
Ohio 1
Algebra not sure.
expel 1?
Congenital 2?
Cognate 2?
herb 1
helicopter 3?
radii 1

Please help? thanks!

To identify the stem extenders in a word, you need to recognize the base or root word and then find any additional affixes that extend or modify its meaning. Here are the stem extenders in the words you provided:

1. Philosophy: No stem extenders. The stem or root word is "philosophy."
2. Banana: No stem extenders. The word itself is a stem.
3. Pheumectomy: No stem extenders. The stem or root word is "pheum" combined with the suffix "-ectomy."
4. Anthropology: The stem extender is "anthro-," which is the stem or root word for "Anthropology."

Now let's analyze the number of morphemes in each word:

1. Sown: Contains one morpheme, which is the base word itself.
2. Airsickness: Contains two morphemes. "Air" is one morpheme, and "sickness" is another.
3. Ohio: Contains one morpheme. The entire word is a single morpheme.
4. Algebra: Contains one morpheme. The entire word is a single morpheme.
5. Expel: Contains one morpheme. The entire word is a single morpheme.
6. Congenital: Contains two morphemes. "Con-" is a prefix, and "genital" is the stem or root word.
7. Cognate: Contains two morphemes. "Cogn-" is a stem extender or root word, and "-ate" is a suffix.
8. Herb: Contains one morpheme. The entire word is a single morpheme.
9. Helicopter: Contains two morphemes. "Heli-" is a stem extender, and "copter" is the stem or root word.
10. Radii: Contains one morpheme. The entire word is a single morpheme.

I hope this helps clarify the concepts of stem extenders and morphemes for you.