Australia is in the Southern hemisphere. Which of these statements is correct about Australia? It experiences the first day of summer at Position 3 and first day of winter at Position 1.
It experiences the first day of summer at Position 1 and first day of winter at Position 3.
It experiences the first day of autumn at Position 3 and first day of spring at Position 1.
It experiences the first day of autumn at Position 1 and first day of spring at Position 3.

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 : )

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

when it is at an intermediate population density