Which of these statements best describes a difference between Layer A and Layer B? Layer B is solid but layer A is molten.
Layer A is solid but layer B is molten.
Layer A moves in cyclic pattern but Layer B is stationary.
Layer B moves in cyclic pattern but Layer A is stationary.

it would be c. xylem.

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )