12 Which pair of organisms would most likely compete for food?
A. cow and chicken
B. snake and hawk
C. mushroom and shrub
D. brown bear and salmon

answer; ///(b) it is composed of four protein chains and four heme groups;

d) center of the mid-ocean ridge

give brainleysest

sinserly,

steckh986

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.