Ecological pyramids are drawn where predators are above prey and they show the population number of each organism shown. Therefore, as the pyramid rises, the population number of the organism decreases, ultimately resulting in a roughly pyramidal shape. Since, organisms higher up the food chain tend to be less numerous than those at the preceding trophic levels, the pyramid is often the classic pyramidal shape. The difference in numbers of organisms at different levels can be so great that logarithmic scales have to be used.
Answer:
Option C, 
Explanation:
The diploid number of chromosomes are represented as 
.
Here the somatic chromosome number is 
which can be represented in the "" format with N being equal to 
.
Now, as we know that the total number of chromosomal combination with chromosome number being
is equal to
Substituting the given values in above equation, we get -
Therefore, total of different combinations of centro-meres could be produced during meiosis.
Hence, option C is correct
Answer: Winds are primary energy source for currents that flow horizontally in the ocean surface layers (less than 100 to 200 m deep). Hence surface currents often called “wind driven currents” or “wind drift currents”.
Currents that flow deep in the oceans below the level affected by winds are generated by convection caused by variations in water density. Higher-density waters sink and displace (push aside or up) less –dense water. Because density is determined by temperature and salinity, deep-water circulation is called “thermohaline circulation”.
The winds are the primary source for both ‘wind driven circulation’ and ‘thermohaline circulation’ is the sun. Winds are generated by the density variations in the earth’s atmosphere caused by solar heating and radiative and evaporative cooling.
Thermohaline circulation is driven by density difference between ocean water masses caused by temperature and salinity variations.
Explanation:
This is the main cause to form a wave over the sea surface.
Answer:
Evelyn is using reuse as a form of conservation
