Explain how environmental agents such as chemicals and radiation cause cancer.

Galaxy whose shape seems different follow no set pattern are classified as

Ascientist observes certain changes in the physical features of a particular species over time. she concludes that the species has undergone evolutionary change. she wants to study the animals by analyzing their population. she’ll use . the population of this species is decreasing considerably. if this trend doesn’t change, this species will fall under the category of animals. this is a plato question,i need to make up his biology credit.

Ahuman female has a special pair of chromosomes that are represented by the letters a) xx. b) xy. c) yy. d) xz.