The bulliform cells present in the epidermis of grasses help in folding of leaves during hot summer day and prevent transpiration.

The xylem vessels are formed from a number of cells, so they are called syncytes.

Matrix of the bone also contains calcium and magnesium salt which also add in building rigidity of the tissue. Cartilage is soft and pliable as its matrix has a flexible material, the chondrin. Matrix of the cartilage chiefly consists of chondroitin sulphate, that is capable of withstanding considerable pressure.

The Bohr effect describes hemoglobin's lower affinity for oxygen secondary to increases in the partial pressure of carbon dioxide and/or decreased blood pH. 

Basic proteins rich in lysine, found in nucleoplasm. Binds with negatively charged DNA forming Octamers called nucleosome.

Secondary Protein: Myosin protein, Actin protein, Albumin, globulin, Trypsin Tertiary Protein: ( Hemoglobin protein)

Carbon dioxide and water are the waste products removed by the lungs in the expired air

One of the major effect of dengue fever is the low platelet counts. It leads to life threatening condition if left untreated.

Oxysomes.

Mitosis cannot occur without DNA replication in S-phase because the trigger for mitosis takes place due to the disturbance in nucleocytoplasmic ratio caused by DNA replication in S-phase.

Nitrogen is found invariably in proteins, but not in all carbohydrates and lipids.

Appearance of blue colour with the addition of iodine is due to its reaction with amylose of starch.

The sticky layer of cell envelope is called glycocalyx. It is also known as mucilage sheath.

In earthworm, intestine starts from the 15th segment onwards and continues till the last segment.

Glandular epithelium, also known as glandular tissue, refers to a type of epithelial tissue involved in the production and release of different secretory products, such as sweat, saliva, breast milk, digestive enzymes, and hormones, among many other substances.

The dark colour is due to the accumulation of secondary metabolities like tannins, gums, oils and resins, etc.,in the wood tissue. 

This is because the soft body of urochordates is surrounded by a thick test or tunic, often transparent or translucent

The empty space in pneumatic bones helps in weight reduction of skeleton in birds.It is a kind of flight adaptation in birds

Cycas is a living representative of once a large group of gymnosperms which has became largely extinct.

The occurrence of two type of fertilisation in the same embryo sac is called double fertilisation that occurs in angiosperms.

The development to the Zygotes into young embryo takes place within the fgemale gametophytes is considered as percursor of seed habit.

This system is based on common characters of group of organisms, so it can give more or detailed information about the groups of organisms.