Crawfish are shelled organisms that live in shallow freshwater rivers. They can have antennae of different lengths. Two parents with medium length antennae have offspring. One of their offspring has short antennae, and one has long antennae. How did the offspring end up with traits that are different from the traits of their parents? How did the gene combinations result in these traits?​

Which of the rock examples below is most likely to be metamorphic

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol

State officials are considering constructing a road through a forested wilderness area. this action will likely affect the forest ecosystem in various ways. part a: predict how the construction of a road could negatively affect plants and animals in that ecosystem. (3 points) part b: describe one way that the construction of a road could have a positive impact of the forest ecosystem. (1 point)