Answer : Option AExplaination / Solution:
The roots of extant vascular cryptogams and most monocotyledons do not show any secondary growth; they remain entirely primary throughout their life.
Answer : Option BExplaination / Solution:
The basic unit of classification is species. Species are population of organisms that can inter breed among themselves to produce new organisms.
Q4.Which plant hormone is named anti-ageing hormone?
Answer : Option BExplaination / Solution:
A unique role of cytokinins is to produce anti-aging effects on some plant parts. Cytokinins actually provide a younger, healthier look in plants. By adding this hormone to cut flowers, florists are able to slow down the aging process, providing us with prettier flowers for longer.
Answer : Option BExplaination / Solution:
Industries Act was established in the year 1951 for the regulation and development of certain industries. Monopolies and Restrictive Trade Practices act aims to prevent concentration of economic power, provide for control of monopolies, and protect consumer interest. FERA was established to conserve the foreign exchange resources of the country.
Q7.More complex organism cannot give rise to new individuals through regeneration because
Answer : Option AExplaination / Solution:
Complex multicellular organisms have division of labour and tissues are specialized to perform specific function. In regeneration, new individual regains the lost body parts but higher organism cells are not capable to produce all kind of cells.
Q8.The individual transitional communities to inhabit an area are commonly called as:
Answer : Option CExplaination / Solution:
A seral community (or sere) is an intermediate stage found in ecological succession in an ecosystem advancing towards its climax community. In many cases more than one seral stage evolves until climax conditions are attained. seral communities leads to climax communities.