Neuron is called the basic unit of the nervous system because all the parts of nervous system whether it is brain or spinal cord or cranial or spinal nerves all are made of neurons.
Answer:
Divergent Evolution
Explanation:
Evolution it is the continuous adaptation of a species to its surroundings in order to better find food, shelter and mate. There are 2 general types of evolution, in this case two closely related organism are becoming increasingly different to adapt to the different environments where they live. This is called Divergent Evolution. The other type is called convergent evolution, where the opposite occurs, 2 different species develop similar features.
The species of plankton found in sediments and their isotope ratios can show the temperature of the overlying waters when the sediments were deposited.
Answer:
organisms can have only one or many cells
Explanation:
<h3>
<u>Packa</u>g<u>in</u>g<u> Of Dna Double </u><u>Helix</u>:</h3>
Prokaryotes
↬ No well defined nucleus.
↬ DNA is held with some proteins in nucleoid region.
Eukaryotes
↬ <u>Histones</u>:
- ↬ Positively charged proteins.
- ↬ Rich in arginine and lysine.
- ↬ 5 types:- H₁ H₂A, H₂B, H₃ H₄.
↬ <u>Histone octamer</u>:
↬ <u>Nucleosome</u>:
- ↬ DNA (-ve charge) makes two complete turns around the histone octamer (+ve charge) to form a nucleosome.