Answer:
(E) present the two sides of the debate concerning the development of the vertebrate skeleton
Explanation:
In the paragraph, the author talks about two sides of view in the subject of vertebrates evolution. On one hand, he/she says that the first idea of vertebrates development is that the skeleton evolved as a defensive character and that many researchers rely on soft-bodied vertebrates to conclude it. On the other hand, he/she says that other researchers postulate that some vertebrate features (as paired eyes and adaptation in some muscles) could not have evolved if the first vertebrates were not depredators.
Answer:
The correct answer is "At a hotspot".
Explanation:
A shield volcano is characterized by being comprised in its majority of lava flows. The flow usually is really slow and of low viscosity. Shield volcanos are formed at hotspot locations where magma comes from the bottom to the surface. The formation occurs by layers of magma coming up which later freezes and other layers of magma covering up, which consequently forms the volcano.
Answer:
Option (1).
Explanation:
DNA (deoxyribo nucleic acid ) is the genetic material present in all the organisms except some viruses. DNA structure follows the Chargaff's rule.
Accoprding to Chargaff's rule, the ratio of purines to pyrimidines in a DNA molecule is equal to 1. The amount of guanine is nearly equal to the amount of cytosine whereas the amount of thymine is nearly equal to the amount of adenine.
Thus, the correct answer is option (1).