The coralloid roots ofCycas has an algal zone which consists of Blue- Green algaeAnabaena cycadealandNostoc punctiforme.

Hind limb of man consists of 30 bones which are as follows:

1. Femur- 1
2. Fibula- 1
3. Tibia- 1
4. Patella- 1
5. Tarsals-7
6. Metatarsals- 5
7. Phalanges- 14

Leech belongs to Phylum- Annelid. A definite number of segments,ie, 33 segments are found in leech.

Turpentine is a fluid obtained by the distillation of resin from Pinus pinaster trees.

Sporopollenin is biologically most resistant plant material and is present in pollen exine. It is contributed by the tapetum layer of the another wall.

A gametophyte is the plant that produces gametes. The fern gametophyte is a small, bisexual, heart- shaped plant called a prothallus.Sporophyte is the asexual and usually diploid phase that produces spores from which the gametophyte arises. A fern gametophyte prothallus is independent from sporophyte.

Pancreatic juice acts upon both carbohydrates and proteins.

Agaricus is an edible mushroom. It is a saprophytic fungus, which grows during rainy season, in moisture grassy places and in richly manured unploughed fields.

In Gymnosperms, ovule lacks ovary and ovary wall that forms fruit after maturation in Angiosperms.

Ornithine combines with one molecule of NH₃ and CO₂ to produce citrulline. Citrulline combines with another molecule of NH₃ to form arginine. Arginine is broken down into urea and ornithine which repeats the cycle.