1) which of the following is the earliest era of earth's geological time scale a) cenosoic b) mesozoic c) precambian d) paleozoic 2) the idea known as panspermia proposed that life originated in space and came to life inside a a) spaceship b) meteorite c) satellite d) none of the above3) which of the following birds remained ancient looking in the miocene epocha) crowsb) owlsc) grousesd) none of the above

Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.

The mixture of sperm and fluids from the seminal vesicles, prostate gland, and cowper's glands is called

The table below shows the elements that mainly comprise each of the four layers of earth: elements in layers layer main elements crust oxygen, silicon mantle iron, magnesium outer core iron, nickel inner core iron which of these elements make up the layer that is 0.2 to 1.1 percent of earth's total diameter?