Males of many different frog species will ‘sing,’ producing vocalized sounds as part of a mating ritual that promotes their willingness to mate and advertises their location. this best describes which of the following?

intersexual selection

sexual selection

intrasexual selection

asexual selection

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 : )

silt loam

hope this