Studies showing that identical twins are more likely to have similar weights/body compositions than fraternal twins are an indication that genetics play a role in obesity. Other studies show that twins who follow different lifestyles and dietary patterns over time have different body compositions. These latter studies indicate that factors play a role in obesity.
1. True
2. False

The variables for this experiment include the number of each type of sprout, the average height of those sprouts, and the amount of compost given to each plot of land.use the drop-down menus to complete the sentences and identify the independent and dependent variables. the independent variable, the one that you intentionally manipulate, is the the dependent variables, the ones that you measure the response in, are

Genetic diversity is the variation in the genes of an entire species. each circle represents a population of a particular species in different habitats. select the population with maximum genetic diversity

To answer this question, researchers studied populations of the dusky salamander (desmognathus ochrophaeus) living on different mountain ranges in the southern appalachian mountains. the researchers tested the reproductive isolation of pairs of salamander populations by leaving one male and one female together and later checking the females for the presence of sperm. four mating combinations were tested for each pair of populations (a and b)—two within the same population (female a with male a and female b with male b) and two between populations (female a with male b and female b with male a). the proportion of successful matings for each mating combination was measured. for example, when all the matings of a particular combination were successful, the researchers gave it a value of 1; when none of the matings were successful, they gave it a value of 0. then the researchers calculated an index of reproductive isolation that ranged from 0 (no isolation) to 2 (full isolation). the reproductive isolation value for two populations is the sum of the proportion of successful matings of each type within populations (aa + bb) minus the sum of the proportion of successful matings of each type between populations (ab + ba). the table provides data for the geographic distances and reproductive isolation values for 27 pairs of dusky salamander populations.