Which type of white blood cells are concerned with the release of histamine and the natural anticoagulant heparin?
The basophils are probably like mast cells of connective tissue. They release heparin histamine and serotonin. Their nucleus is usually three-lobed and their granules take basic stain strongly.
Monocytes are the largest of all types of leucocytes. Their nucleus is bean-shaped. They are motile and phagocytic in nature. They engulf bacteria and cellular debris. Generally, they will change into macrophages after entering tissue spaces. Eosinophils have a two-lobed nucleus. They are non-phagocytic and help in dissolving a blood clot. Their number increases in people with allergic conditions such as asthma or high fever.
Neutrophils are most numerous of all leucocytes They eat harmful germs and are, therefore, phagocytic in nature. Their nucleus is many lobed and strain weakly with both and basic stains.
Which one of the following in birds, indicates, their reptilian ancestry?
Scales on their hindlimbs
Two special chambers crop and gizzard in their digestive tract
Eggs with a calcareous shell
Select incorrect pair
Porifera – Choanocytes
Coelenterata – Nematocysts
Annelida – Segmentation
Monera – Eukaryote
Bilateral symmetry, metameric segmentation, coelom and open circulatory system are the features of
Gigantism and acromegaly are due to
If a child is of O blood group and his father is of B blood group, the genotype of father is
Correctly matched set of phylum, class and example is