During childbirth, physical stretching of the uterus causes the release of a hormone that results in stronger, more frequent contractions. these contraction increase the stretching of the uterus. this is an example of a) a positive feedback loop, because the hormone increases uterine stretching. b) a negative feedback loop, because the hormone increases uterine stretching. c) a positive feedback loop, because a condition in the body causes an increase in a hormone. d) a negative feedback loop, because a condition in the body causes an increase in a hormone.

The construction of phylogenetic trees is a mapping out the proposed divisions and common ancestors of all living species. traditionally, these trees have been built using morphological data, such as appearance and embryology. recently, it has been possible to construct these trees using molecular data. phylogenetic trees based on different types of information agree with each: that there is strong evidence of a real underlying common descent. this phylogenic tree is composed based on molecular data (rrna). what statements can we infer are true about the organisms throughout the tree? because the tree is rooted, all branches share a common ancestor. all organisms have some sort of cellular structure/organization. all eukaryotes evolved from bacteria. since the organisms contain rna, they share the same dna. if the organisms contain rna, the share the same four nitrogen bases.

If water is at -10 ° c and energy is added to the water until it is 50 ° c while maintaining a constant pressure of 760 mmhg, describe the phase change of the water?

What is a sex-linked genetic disorder that disrupts the blood's ability to clot? a.achondroplasia b.huntington's disease c.hemophilia d.albinism