Biology Test 275

Underground stems of some plants such as grass and strawberry, etc., spread to new niches and when older parts die new plants are formed.

Jute is a bast fiber used for sacking, burlap, and twine as a backing material for tufted carpets. It is a long, soft, shiny fiber that can be spun into coarse, strong threads. It is one of the cheapest natural fibers, and is second only to cotton in amount produced and variety of uses.

The F1-hybrid plants have a different phenotype (pink flowers) than either of the true-breeding parents. This is an example of incomplete dominance. When the F1-hybrid plants are self-fertilized, both parental phenotypes (red flowered plants and white flowered plants) reappear in the F2 generation.

F1 parents - RR (red) x rr ( white )

F1 individual Rr ( pink )

selfing of F1 Rr x Rr

result i.e., F2 1 ( red ): 2 (pink ): 1 (white)

When the substrate releases energy for phosphorylation of ADP (formation of ATP) without ETS then this method of ATP formation is called as substrate level phosphorylation], forms 4 ATP, 2ATP consumed, so 2ATP gained by SLP.

National parks are meant for the in situ conservation of both flora and fauna. Cultivation, grazing, forestry and habitat manipulation by humans are not permitted in National parks.

Seminiferous tubule is the functional unit of testis of man. Each testis has about 250 compartments called testicular lobules, these compartments contain highly coiled tubules called seminiferous tubules. In seminiferous tubules, sperms are produced.

Each limb is made of 30 bones. The bones of the hand (forelimb) are humerus, radius and ulna, carpals (wrist bones 8 in number), metacarpals (palm bones 5 in number) and phalanges (digits 14 in number).

Don't Die of Ignorance was a 1987 public health campaign by the British government in response to the rise of HIV/AIDS in the United Kingdom. The government believed that millions of people could become infected and a leaflet was sent to every home in the UK.

The final stable community in an ecological succession is the 'Climax community'.

Compound epithelium is made of more than one layer (multi-layered) of cells and thus has a limited role in secretion and absorption. Their main function is to provide protection against chemical and mechanical stresses.