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:
Option D, Tundra
Explanation:
Tropical forests have trees of great height and broad leaves of green color. These broad leaves trees generally reproduce asexually by vegetative means such as reproduction from leave, stems, or roots. However, some have the capability to reproduce sexually as well
Pine trees have male and female sexes on the same plant, hence they reproduce sexually.
Tundra has low scope for tree and plants growth. Hence, it mainly consists of Lichens, mosses and shrubs. Mosses reproduce by producing spores, lichen and shrubs also reproduce asexually.
Hence, option D is correct
I think it’s the second one on the left. Not completely positive but I think so!
<span>A person is able to squeeze a clothespin more times if they exercise beforehand because many body systems have been activated during the prior exercise. The respiratory system is activated providing increased oxygen to brain and other muscles. The circulatory system is activated to move blood from lungs and brain to the proper muscles. The brain has been activated to a mechanical task such as muscle movement.</span>
Can be extremely corrosive