Answer:
A) Contains DNA
Explanation:
See it this way, which one would make more sence?
I believe the answer is the B-cell
These are types of lymphocyte derived from the bone marrow and provides the humoral immunity. They produce antibodies; which are proteins that sticks to pathogen preventing them from sticking to cells and flagging them for destruction. The primary role of the B-cells is to make antibodies in large amounts and assist in destroying foreign agents through role as APC.
Answer:This relationship is an example of a morphological similarity reflecting a likely evolutionary link
Explanation:
Lungfish and Coelacanths are distinct from other fish because they are lobe-finned species.
Lately, major palaeontological studies proposed that Lungfish and Coelacanth form a monophyletic sister group that is related closely to the tetrapods.
A monophyletic group is a group of organisms that include all the descendants and they share a common ancestor.
The method used here is agarose gel elecrtrophoresis in which DNA ladder is used which is a set of standard used to determine the size of DNA used .The DNA ladder is put adjacent to the DNA fragments to be visualized Suppose if the ladder shows 300 basepair so the DNA adjacent to this number will be of this size.These are the set standards used to determine the size of DNA or RNA. For a range we can take 2% of agrarose to run DNA fragments upto 500 Basepair. Most of the amplified DNA falls into this category size.
Answer: Fish food
Explanation:
The unconditioned stimulus here is the fish food which is given to the fishes when the light is switched on.
The fishes are being habitual of this fact when the light is switched on the fishes swim to the upper part of the water in order to get food.
In an unconditioned response, the response generated by the body is involuntary and is trigerred when the things related to this happen.
