Answer:
<u>Option:</u>False.
There are billions of microorganisms including bacterial life, archea, insects and many other living beings which resides inside the various layers of the soil.
Explanation:
There more then billions of a microorganisms which lives inside the various layers of the soil and mainly performs the function of decomposition inside the environment, which leads to break down of macro-molecules inside the environment and enough energy is released by the breakage of bonds present on molecular level. As the optimum amount of energy is required to drive all the cellular processes and more over for the sake of conservation of energy inside the biosphere.
- <u>Fertility of the soil and fixation process:</u>
The fertility of the soil is greatly effected by the right amount of microorganisms present in it. As the microorganisms along with other insects and bacterial life greatly effects the fertility of any soil sample.
Answer:
At each higher level of consumption, the amount of toxin is magnified.
Explanation:
Those predators all eat smaller secondary consumers, and those secondary consumers eat the primary consumers, which a lot of the times are exposed to DDT. For example bugs are often the primary target for DDT, once those bugs are exposed to the DDT they carry it in/with them. When a fish eats the bug, that fish is now exposed to the DDT. When the fish is caught and eaten by an eagle that eagle and its young are now being exposed to DDT. The DDT might not effect the full grown eagle for its lifetime but it does effect its young.
A compass
The Earth's magnetic field, provided by the magnet in a compass, shows the direction of the north and south poles.
ANSWER MADE BY AN AI
Answer: "Decreasing the salt concentration of the solution lowers DNA's melting point (Tm)" is not a true statement
Explanation:
Increasing salt concentration would lower the DNA's melting point (Tm), not otherwise.
For instance:
- In 8M urea (8M means 8 Moles per dm3), Tm is decreased by nearly 20°C.
- 95% formamide at room temperature would completely denature the double stranded DNA.
Thus, higher concentration of salts like urea or formamide lowers Tm, not otherwise