Rose bush — grasshopper — mouse — snake —hawk — earthworm
the hawk could eat either the snake or the mouse and, thus, could represent which two different levels of the food chain?
(a) producer and primary consumer.
(b) primary and secondary consumer.
(c) secondary and tertiary consumer.
(d) tertiary and quaternary consumer.
(e) quaternary consumer and detritivore

answer: that would be cheating

explanation:

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.

the answer is c.

by: nicholas dooley