Answer: <u>Guanine
</u>
According to Chargaff's rule, the base pairing in the DNA and RNA is fixed. Adenine always pairs with Thymine in DNA and Uracil in RNA. Guanine pairs up with cytosine. This complementary base pairing is universal and constant. That's why amounts are also equal. It means if cytosine is 20% in any DNA sample, then amount of guanine would be 20% as well.
Answer:
True
Explanation:
Mitotic spindle formation depends on the capturing of microtubules at kinetochores. During prophase phase of the cell division, spindle fibers emerge from the centrosomes after nuclear envelope breaks down and nucleolus disappears
In the Prometaphase, kinetochores appear at the centromeres on one hand and on the other hand chromosomes continue to condense and mitotic spindle microtubules attach to kinetochores
Hence, it is true
Solids
The particles in solids are very close together. They are tightly packed, giving solids high densities.Liquids
The particles in liquids are close together. Although they are randomly arranged, they are still tightly packed, giving liquids high densities. The density of a substance as a liquid is usually only slightly less than its density as a solid. For example, the density of solid aluminium is 2.72 g/cm3 and the density of liquid aluminium is 2.38 g/cm3. This means that liquid aluminium floats on top of solid aluminium.Water is different from most substances: it is less dense as a solid than as a liquid, because its particles move apart slightly on freezing. This is why ice cubes and icebergs float on liquid water.Gases
The particles in gases are very far apart, so gases have a very low density.