Quizlet It is found that many regulatory genes have been co-opted for the development of different structures, such as limbs or digits. This is an example of what type of biological research

evolutionary developmental biology (evo-devo)

Explanation:

Evolutionary developmental biology (evo-devo) is a relatively new field of biology focused on the comparison of developmental processes between organisms in order to infer evolutionary relationships among species and understand such developmental mechanisms. This research area has shown to be very useful to understand how morphological evolution occurred. Moreover, evo-devo also shows how changes at the genome level can be translated into morphological and phenotypic changes among species/higher taxa. Evo-devo challenges the so-called 'gene-centered point view of evolution', which holds that adaptive evolution mainly operates by means of the differential survival of ​competing (selfish) genes.

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

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.