11. A student is constructing the model above of the Sun, Earth, and Moon system to demonstrate Moon phases. Based on where the student has placed the moon phase
labels, where should the student place the lamp that represents the Sun in order to
make the model accurate?
I
A North of the Earth model
B West of the Earth model
C South of the Earth model
D East of the Earth model

surface modification is a versatile tool and has been widely used in material science and engineering that has significantly facilitated the study and characterization of complex materials. at  matexcel, experienced experts in surface science can offer tailored efforts to meet the specific needs from our clients.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

1. dermis

2. chemical

3. urine

4. viruses

5. antibodies