Near the end of both March and September, a. spring begins in both hemispheres.
b. the sun's rays strike Earth with the same intensity everywhere.
Earth's axis is no longer pointing at the North Star.
d. neither end of Earth's axis is tilted toward the sun.
c.
Please select the best answer from the choices provided
Ο Α
OB
Ос

the concept of nucleosome occupancy, which reflects the fraction of cells from the population in which a given region of dna is occupied by a histone octamer

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

if you listed your answers right then i believe your answer is b.

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.