Answer:
The evidence that is most likely to support the idea that dinosaurs and their ancestors could have coexisted for millions of years is bones of three different species were found in the same rock layer (option D).
Explanation:
Fossils have been the strongest evidence of the existence of extinct species in the remote past. The discovery of some species and their possible ancestors in the same layer of rocks confirms the possibility of the coexistence of evolutionary forms of the same species, for a great period of time.
Once the fossils have been found, paleontologists use molecular genetic techniques to identify the fossils and their relationship with others found in the same place.
The approach suggests that it is not necessary for a species to become extinct in order for its evolutionary descendant to appear, considering coexistence for thousands or even millions of years.
The other options do not provide solid evidence to support this approach.
<em>A. Fewer fossils were found of amphibians than of dinosaurs, which does not specify an evolutionary relationship.</em>
<em>B. More fossils found were of larger organisms than of dinosaurs, which is not true, because species descended from dinosaurs tend to be smaller.</em>
<em>C. Herbivore bones were found in each rock layer, not related to the approach.</em>
When you boil water, you aren't changing the elements. You're just making water vapor. However, when you burn paper, it becomes carbon (mostly). So physical changes will not change the substance, only chemical changes will.
Answer:
is 4
Explanation:
Fe + 3O₂ → 2Fe₂O₃
The law of conservation of mass states that "matter is neither created or destroyed in a system". Now, by careful inspection of the atoms reacting and the product formed, we see that the equation is not balanced.
Fe on reactant side is 1 but 4 on the product side. To balance it up, we simply put 4 as the coefficient behind the iron atoms.
4Fe + 3O₂ → 2Fe₂O₃
Answer:
Diameter of the wire is 0.119 mm.
Explanation:
Density of the metal = 
Mas of the wire = m = 42.9 mg = 0.0429 g
1 mg = 0.001 g
Let the radius of the wire be r
Length or height of the wire = h = 0.200 m = 20 cm
1 m = 100 cm
Volume of the wire = V




r = 0.00595 cm = 0.0595 mm (1 cm = 10 mm)
Diameter of the wire = d = 2r = 0.119 mm.