Which among, the following is a solid lubricant?

A. carbohydrate

B. graphite

C. protein

D. starch

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. Most of the enzymes are
  2. When does the heart start functioning?
  3. The insects do not have blood pigments because
  4. Man is warm-blooded, frog is cold-blooded, Which one of the following is cold-blooded?
  5. Plants grown in darkness show
  6. Vitamin D is known as anti-rachitic vitamin because it cures the deficiency disease called
  7. Which organelle in the cell, other than nucleus, contains DNA?
  8. The layer of stagnant water in which light penetrates is called
  9. The tear glands help us in
  10. Insulin is concerned with the metabolism of
  11. Intravascular clotting of blood is known as
  12. The spider spins its web from a liquid secreting from its
  13. The natural defence of our body against foreign germs is formed by
  14. Which among the following may carry rabies?
  15. Organisms that live in the deep sea are mainly
  16. The biologist who believed in the spontaneous creation of microorganisms was
  17. Valve a are present inside
  18. Biologists have so far known, found and identified a large number of species in the plant and animal…
  19. The blood of cockroach shows the following characteristics except one. Mark it.
  20. It Is not advisable to sleep under a tree at night because of release of
  21. Oparin is known for his hypothesis on
  22. What are top carnivores?
  23. Antibodies are formed in
  24. Organisms that feed on the excreta of other organisms are called
  25. The biogenetic law was proposed by
  26. The dinosaurs (terrible lizards) became very successful during
  27. The condition in which there is abnormal decrease of white blood corpuscles is known as
  28. What are oncogenes?
  29. Origin of species was published by
  30. Mutations could be created by X-rays. This was found by