Why did alfred hershey and martha chase choose to use bacteriophages in their research?

a) bacteriophages are made up of dna surrounded by a protein cast.

b) bacteriophages break bacterial cells into basic components.

c) bacteriophages contain radioactive sulfur and phosphorus.

d) all of the above.

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?

To store strawberries in sugar syrup, lucy placed them in a jar and covered them with sugar but did not add any water. do you think syrup will be formed? justify. a. no. since water is not added, there cannot be any syrup formation. b. no. the higher concentration of sugar on the outside will cause the water from the sugar to diffuse in the strawberry cells causing them to swell without formation of any syrup. c. yes. the higher concentration of sugar on the outside will cause the water from the strawberry to diffuse out resulting in syrup formation. d. yes. the sugar will melt over time and form the syrup.

Select the correct answer. which statement applies only to the axial skeleton, not the appendicular skeleton? a. it contains a pivot joint. b. it has muscles attached that work in pairs. c. it contains red bone marrow. d. it possesses fossa for bone articulation. e. it protects the heart and lungs.