My test is timed plse answer
what is the basis of all sounds?
a. vibrating molecules in the air
b. wave cycles
c. nodes
d. waveforms

answer'(basidium)the spore--bearing structure of a basidiomycete is called a basidiocarp; ///

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.