Select all the correct answers. The image shows a week-old chick embryo. What can you conclude about its current stage of development?

A spinal column is present.
The chick will develop four limbs and a beak.
It’s an invertebrate.
It’s sexually mature.
It’s about to undergo a metamorphosis.

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.

it depends on how much it could carry.