Use the Key to Choose the Best Answer

question 8

Multiple Choice

Use the key to choose the best answer.
-(1) pH in the stomach during digestion
(2) pH in the duodenum during digestion

• A)First item is greater than the second item.
• B)First item is less than the second item.
• C)First item is equal or nearly equal to the second item.

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Definitions:

Axopods

Long, slender, and sometimes retractable projections of some eukaryotic cells involved in locomotion or feeding.

Flagellated Cells

Cells possessing one or more flagella, which are long, whip-like structures that can propel the cells through liquid environments.

Red Algae

A large group of algae known for their reddish color, which is caused by phycoerythrin; they are mostly marine and play a role in coral reef ecosystems.

Serial Endosymbiosis Hypothesis

A theory suggesting that the organelles of eukaryotic cells, such as mitochondria and chloroplasts, originated as symbiotic relationships between separate prokaryotic organisms.