The sweet potato is a common crop plant found in most warm areas of the world. The plant rarely flowers and more rarely makes seeds. However, the roots and potato vines spread rapidly, and new plants are easily grown from the roots and vines of old plants. Some scientists would like to grow new types of sweet potatoes that parasites will not attack. Which of these processes is most difficult in developing new types of sweet potatoes?

A. planting root stocks
B. cutting vines
C. removing parasites
D. selective breeding

Agas in a balloon at constant pressure has a volume of 160 ml at -125*c. what is its volume at 29.0*c?

Will mark brainliest 26. which of these statements are true? (3 points) a. gases are compressible b. gases fill their containers completely c. the pressure of a gas is independent of the temperature d. gases have mass e. gases exert pressure f. the pressure of a gas is dependent on the volume g. gas pressure results from the collisions between gas particles h. gases have a definite volume and shape

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.