Chicken embryos express both Hoxc6 and Hoxc8 in regions where ribs form, but only Hoxc6 in regions where forelimbs form. The fossilized jawbone of a new species of animal was found, and enough DNA was extracted to discover that it had both Hoxc8 and Hoxc6 genes. Which of the following is true of this new species?

a) it definitely has forelimbs. b) it definitely does not have forelimbs. c) can't tell without knowing the gene expression pattern. d) can't tell because chicken genes tell us nothing about other species.

Which sentences describe the logistic growth model? there are three different phases of the s-shaped curve. at first, growth is exponential because individuals are few and resources are plenty. this growth model occurs in a situation where resources are plenty and individuals are few to consume the resources. population growth decreases as resources become limited. when a population size reaches the carrying capacity of its environment, the population growth slows down or stops completely. the model looks like a j-curve.