Answer:
Thick diameter, Myelinated
Explanation:
A alpha neurons conduct action potentials faster because of their large axon diameter and myelin.
- The large diameter is less resistant to the flow of ions and allows for faster conductivity.
- The myelin sheath is a layer of fat acting as to insulate the axon which helps increase signal conductance.
For Plato users...
A. It is a special kind of elliptical orbit.
Answer:
(A) speciation.
Explanation:
Shrinking of water bodies and development of deserts since the Pleistocene ice age produced new vacant niches that could be inhabited by organisms such as fishes. Production of new isolated streams, ponds, and springs allowed the fishes to occupy these new water bodies. Accumulation of genetic variations to become adapted to their new habitat resulted in the evolution of several new species of fishes with many different genetic traits. This represents speciation due to geographical isolation.
Since each parent has four different combinations of alleles in the gametes, there are sixteen possible combinations for this cross. So true
Answer:
False
Explanation:
In DNA double helix molecule, there are four types of nitrogenous bases: adenine, guanine, cytosine and thymine. Purines (i.e., adenine, guanine) and pyrimidines (i.e., cytosine and thymine) hold DNA strands together via hydrogen bonds. In base pairing, guanine always pairs with cytosine through 3 hydrogen bonds, while adenine always pairs with thymine by 2 hydrogen bonds. Hydrogen bonds are a type of dipole–dipole interaction where a hydrogen atom is covalently bonded to a very electronegative atom (e.g., Nitrogen or Oxygen).
