Answer:
The phenomenon through which certain pollutants (harmful chemicals) get accumulated in tissues of organisms at different trophic levels in increasing concentrations along the food chain, is called Biomagnification.
Explanation:
1)Suppose, DDT is being used in a farmland.
2)There's a water body nearby the farmland and the water is contaminated with the DDT(let's say the quantity: 0.003 ppb).
3)Now the aquatic organisms (Zooplankton) which consume this water also consuming the DDT also.(0.04 ppm)
4)Next these Zooplanktons are consumed by small fishes. (0.5 ppm)
5)These small fishes are then consumed by Large fishes. (2 ppm)
6)These Large Fishes are consumed by Humans or Birds afterwards. (25 ppm)
7) So at each step DDT is also getting accumulated and at each successive trophic level the quantity of Accumulated DDT gets magnified as the organisms on higher trophic levels consume more biomass than the previous ones. This is a classical example of Biomagnification.
Answer:
Nucleus: (FUNCTION: The nucleus has very important roles to play. As it contains genetic material, it coordinates cell activities like protein synthesis and cell division.)
The nucleus is like the brain of the cell, it controls everything like our brain does.
Cell wall: (FUNCTION: The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection to the plant.)
The cell wall is like a security blanket around the plant, it protects and holds up the plant.)
Mitochondrian: (FUNCTION: Known as the “powerhouses of the cell,” mitochondria produce the energy necessary for the cell's survival and functioning. )
The mitochondria is like the powerhouse of the cell because it provides most of the power.
Explanation:
;) hope this helps
Answer:
C) The cells of the new unknown microorganism may be too small to see with the objective and ocular lenses you used.
Explanation:
A microscope can visualize the microbes of various size only when the suitable lens with the required resolving and magnification powers are used. In the given experiment, control slides were observed under the microscope but the cells of the unknown organism were not visible. This means that the sample contained the microbial cells of a very small size that could not be seen with 40X and 10X lenses. The use of lenses with more magnification power would have helped here.
Http://www.answers.com/Q/What_happens_in_meiosis_during_telophase_II?#slide=2
Growth hormone in the <span>pituitary gland</span>
