Answer:
See the answer below
Explanation:
Autotrophs are organisms that have the capacity to manufacture their foods from freely available inorganic products. There are two types of autotrophs
1. The photosynthetic autotrophs: these are green plants and blue-green algae that possess chlorophyll. The chlorophyll is used to trap radiation from the sun in the presence of water and carbon dioxide to manufacture carbohydrates which serve as their primary foods.
2. The chemosynthetic autotrophs: these are usually bacteria that make use of energy from inorganic chemicals (such as hydrogen sulphide, iron sulphide, etc) to reduce carbon dioxide and produce carbohydrates in the process.
<u>Photosynthesis is quantitatively more important to life on earth because green plants form the base of several food chains.</u> The energy locked in the carbohydrate produced during photosynthesis is important for other lives in the ecosystem and this is passed on through the various levels in the food chain. Also, the by-product of photosynthesis, the oxygen, is important for the survival of most life on earth who depends on oxygen for respiration. Chemosynthesis only occur in habitats where the radiant energy of the sun is lacking, such as hydrothermal vents.
There are 384 fluid ounces in 3 gallons. The teacher does not have enough for each student to have 12 fluid ounces.
384÷12=32
4 students would go thirsty.
Answer: Blood
Explanation:
Blood can transport nutrients, vitamins and minerals to the cells.
Answer:
Dmitri Ivanovsky
Explanation:
Dmitri Ivanovsky utilized one of these filters in 1892 to demonstrate that despite being filtered, sap from a diseased tobacco plant remained infectious to healthy tobacco plants. The filtered, infectious substance was dubbed a "virus" by Martinus Beijerinck, and this discovery is regarded as the origin of virology.
T-cells functions in cell-mediated immunity while b-cell functions in humoral immunity .
Hence Option A is correct.
What is cell-mediated immunity?
cell-mediated immunity is an immune response that does not involves antibodies .in this immunity , the specialised T-lymphocytes circulate in blood and tissue and directly attacks antigens .these cells either attack directly the antigens or produce clone of cells which respond to antigens .killer T-cells destroys pathogens and provides cell-mediated immunity. it destroys pathogens cells by secreting lysozymes. it shows its activity at the location of antigen presenting tissue. it has slow response.
What is humoral immunity?
humoral immunity is a type of immunity that mediated by macromolecules including secreted antibodies ,complement proteins ,and certain antimicrobial peptides.in this type the B-lymphocyte produce antibodies in blood and lymph ( known as humors). it protects the body against the invasion of bacteria and viruses into the body by antigen-antibody reactions. antigen specific plasma B-cells provide antibody mediated immunity .it normally causes agglutination and neutralization of foreign antigens. it shows its activity in extracellular fluids. it has fast response upon detection.
T-cells :
It is a part of white blood cell. it is apart of immune system and develop from stem cells in the bone marrow .they help in protection of body from infections and may help fight cancer.it is also called as T-lymphocyte.
B-cells:
It is a type of white blood cell that makes antibodies. B-cells are part of the immune system and develop from stem cells in bone marrow .it is also called as B-lymphocyte.
Hence OPTION A is correct.
Learn more about B-cells and T-cells here
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