Answer:
peptide antigens by MHC class II molecules
Explanation:
Helper T cells are activated by peptide antigens by MHC class II molecules. These antigens express on the surface of antigen-presenting cells (APCs). After activation, the T helper cells divide and secrete cytokines to assist the immune response.
Answer:
Qualitative and quantitative are two research technique that used in microbiology to collect the data information. These are very useful techniques.
Explanation:
There are several technique has been used in microbiology in collecting data. There are qualitative and quantitative collection of data. Qualitative data tells about data intent in yes or no form. The other techniques such as quantitative technique which provide information about the numerical value of data.
Qualitative technique is used in research would collect data on growth of the bacterial sample on the solid growth of the sample. It is used to assess whether the bacteria in the data is living or dead. It reveals the wealth of the qualitative information of data. The observation of microorganism in microscope get information whether the organism is in propelled motion or its dead.
The appropriate answer is c. whole-wheat bread. Honey is a rich source of carbohydrate and corn oil margarine is a good source of fats. Farm-raised salmon is a good source of protein. Whole wheat used to make bread is a plant derivative rich in cellulose which is the main component of fiber. Cellulose can only be found in plant cell walls.
If an A (Adenine) were swapped for a T (Thymine) it will lead to A TRANSVERSION TYPE OF POINT MUTATION.
Replacement of an A with a T is a transversion type of point mutation because in transversion the purine is replaced with a pyrimidine. Since in this case only one nucleotide is replaced, it is a point mutation.
Answer:
Climate change is the change of temperature in the worlds climate system and climate variability is the variations in a certain climate that last longer then certain weather events.
Explanation:
To explain more climate change is the change in the daily weather in a area for example rain forest to desert or cold to hot climate change goes along with global warming which is the heating of our Earth which causes ice to melt in the arctic rising our sea levels creating stronger storms. While in a climate variability its only a certain time of that specific climate change for example its only cold for a certain period of time then the temperature rises to hot again. So, the key difference is that "climate change is the change of temperature in the worlds climate system and climate variability is the variations in a certain climate that last longer then certain weather events."
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