Answer:
Types of Roots : Roots are of two types viz. (a) Tap roots(normal or main) and
(b) Adventitious roots.
(a) TAP ROOT-Here the radicle prolongs directly to form a main primary roots when the primary root becomes stronger and persistent, it forms the tap root e.g. roots of dicotyledonous plants.
Primary root forms tap root, its lateral branches are secondary roots; branches of secondary roots in turn produce tertiary roots and so on. The tap root with its branches forms the tap root system.
Answer:
Population and resources
Explanation:
By defining the term <em>carrying capacity of earth, we can think of it as " the maximum number of people whose survival can be supported by earth". </em>
Studies have predicted that the carrying capacity of earth can be somewhere between 2 billion to 40 billion individuals. But it can not be calculated in specific number because it depends on the availability of resources.
With the increase in development and progress in modes of communication, travel, food etc, all these advancements have put alot of burden on mother nature where the resources are declining at a rapid pace. The fossil fuels being limited resources can be consumed earlier than our prediction due to increase in population and the search of human towards an easier lifestyle. This is putting alot of pressure on earth to maintain the carrying capacity at a higher rate. Therefore, carrying capacity is determined by the number of people our earth can support or population as well as resources earth has to offer.
Hope it helps!
Answer:
x = oxygen
Explanation:
Food and water is essential to life at cellular level because this water is responsible for making food with the help of CO2 during photosynthesis in plant and this food provides energy to the cell and support the life of plant cell. In an animal cell, H2O helps in releasing waste product from cell and provide a medium for reactions to occur.
Apart from food and water oxygen is also required to support life because oxygen is required by cells to oxidize food and release energy from food so this energy is used to perform metabolic function of cells that support cell life.
Answer: B
Explanation:
Synthesis of an inducible enzyme requires the substrate bound to repressor.
In the synthesis of a specific inducible enzymes, a substrate on which the enzyme acts must bind to the repressor that prevents the synthesis of the inducible enzyme. Example of an inducible enzyme is β-galactosidase in Escherichia coli that degrades lactose and galactose.
The synthesis of β-galactosidase is regulated by a repressor protein, that binds to the region of deoxyribonucleic acid (DNA) that codes for the synthesis of β-galactosidase. If lactose or galactose (substrate) is present, it acts as an inducer which induce the repressor protein from binding to DNA. Hence the enzyme is synthesized