Answer:
The three main similarities between prokaryotic and eukaryotic cells are as follows-
- Both the type of cells undergoes the process of respiration
- They both require energy to carry out the various processes
- They are both comprised of distinct cell membrane.
The three main differences between prokaryotic and eukaryotic cells are as follows-
- Prokaryotic cells are comprised of circular DNA, whereas eukaryotic cells are made up of linear DNA.
- Prokaryotic cells does not contain any nucleus, whereas eukaryotic cells are comprised of a well-distinct nucleus.
- Prokaryotic cells does not contain chromosomes, whereas eukaryotic cells are comprised of chromosomes.
<span>When a tuning fork vibrates over an open pipe and the air in the pipe starts to vibrate, the vibrations in the tube are caused by d. resonance. When the tuning fork vibrates near the open end of the cylinder, the sound waves from the fork are sent into the pipe. When one object vibrates, it forces another object to vibrate at the same frequency and this is called resonance</span>
Answer: DNA and RNA are both examples of nucleic acids
They consist of a strand of nucleotides with a phosphate group, a 5′ sugar and a nitrogenous base.
Extra info: DNA and RNA molecules are polymers. DNA is double stranded, whereas RNA is single stranded.
The nucleotides of DNA can pair together by base pairing, creating a strand that is complementary to its pair
Various types of RNA exist which have roles in protein synthesis as well as regulation of cellular programmes by fine-tuning gene expression.
The correct option is DENDRITIC CELLS.
There are two types of immune system in vertebrates, these are innate immune system and acquired immune system. The acquire immune system is also known as adaptive or specific immune system.
The adaptive immune system is made up of antibody responses and cell mediated responses, which are brought about by different types of lymphocyte cells, B cells and T cells. Cell mediated immunity involves the activation of natural killer cells, antigen specific cytotoxic T lymphocytes, macrophages, dendritic cells, and various cytokines; these cells are highly specialized cells and they are always released in response to antigens, they are responsible for the elimination or prevention of growth of invading pathogens.
Each of the adaptive immunity cells has its specific manner of operating. The dendritic cells and macrophages operate by engulfing invading pathogens and digesting them into thousands of antigens; these antigens are then detected and engulfed by antigens presenting cells.
Acquired immunity system always creates immunological memory after an initial encounter with pathogens and this leads to an improved response in case they come in contact with the pathogen again in the future. This mechanism is the basis on which vaccination operates.
Blue, they are called blue giants, and since they usually are very big compared to our sun, they don’t last long before supernova.
