Agene family that codes for various hormone receptors has been accumulating nucleotide ubstitutions at a rate of 0.4 per million years. on average, there have been 60 substitutions between the common ancestor of this gene family and each of the various living forms of this gene. based on these figures, this hormone receptor gene family likely originatedmillion years ago. a. 15 b. 24 c. 75 d. 150 e. 300

The is an estimate of the fewest number of organisms a population needs to avoid extinction. this measurement will most if the number of offspring each female in the population produces increases. if the population's this measurement will most likely increase. 1 population density, minimum viable population, carrying capacity 2 decrease, be unaffected, increase 3 death rate increase, dead rate decrease

During convection, less dense fluid rises and denser fluid sinks.

Earthquakes a.created the rock in arches utah b.can be caused by volcanic eruptions c.are caused by tsunami waves d.wear mountains down into hills