FlashcardIzz Practice Test 2

Front

How do stem cells become specialized to absorb nutrients from food as intestinal cells?

Back

by gene activation

Front

Which is not a characteristic of prokaryotes? Options: circular DNA, presence of ribosomes, lack of membrane-bound organelles

Back

cell specialization

Front

Which factor most likely causes Pepsin to denature as it moves through the digestive tract? Options: pH, temperature, enzyme concentration, substrate concentration

Back

pH

Front

What would happen to a freshwater protozoan if it were placed in a tank of salt water?

Back

It would lose water through osmosis.

Front

What adaptation allows an organism to pump excess water out of a cell?

Back

contractile vacuole

Front

Which form of transport permits water to cross a semi-permeable membrane from areas of high concentration to low concentration?

Back

osmosis

Front

Which reaction would the body use to maintain homeostasis in cold temperatures? Options: shivering, sweating, rumbling of the stomach, restricting of blood vessels in the skin

Back

shivering

Front

Which body substance most likely has its pH balanced most often? Options: blood, saliva, stomach acid, oils found in the skin

Back

blood

Front

Which is the role of the contractile vacuole in a paramecium?

Back

It is used for pumping out excess water to help maintain a suitable osmotic pressure.

Front

Which structures contain all the others? Options: chromosomes, genes, nucleolus, nucleus

Back

nucleus