Answer:
Antigen-presenting cells
Explanation:
Class II MHC molecules are present on the surface of all the antigen-presenting cells. Some of the examples of antigen-presenting cells (APCs) are dendritic cells, macrophages and B cells.
The Class -II MHC molecules are formed in the endoplasmic reticulum of these cells followed by binding of antigen peptide fragments to these class II MHC molecules. The antigen-MHC II complexes are then inserted into the plasma membrane of these antigen-presenting cells.
Answer:
Explanation:
Like a spinning top, our Earth rotates. Rotation is the movement of a body on its axis. ... During this rotation, the change in direction of Earth's axis of rotation is known as precession. Earth's axis precesses in a 26,000-year cycle
2) pathogenic
3) toxin
9) diarrhea
20) spirochete
22) cell wall
The distribution of biomes is greatly influenced by the climatic conditions. The areas receiving more rainfall are lush green with variety of diverse species growing in that region while deserts have less vegetation.
The distribution of biomes in the Northern hemisphere is similar but not identical to the distribution of biomes in the Southern hemisphere. The Northern hemisphere is characterized by long and cold winters while summers are short. The Southern hemisphere is not as colder as Northern hemisphere except Antarctica. More oceans are present in the Southern hemisphere while Northern hemisphere has larger portions of the land. Also, the mountains in the Northern hemisphere has mountains and land that act as obstruction for the wind. Whereas, the wind blows unobstructed in Southern hemisphere. These are the reasons for not having identical biomes in both the regions.
Answer:
The conclusion is that different matters have different biomass percentages.
Explanation:
Different matters have different biomass percentages because they are formed from different elements. each biomass is formed from the elements such as carbon, oxygen, hydrogen and nitrogen. for example, the human body is composed of 30 percent of biomass while 70 percent is water. the percentages of different elements are carbon (12%), nitrogen (0.6%), hydrogen (62.9%), oxygen (24%), calcium (0.24%) and phosphorus (0.14%). At each level, only 10 percent of biomass is transferred to another level and remaining 90 percent releases in the form of heat.