Answer: Sebum
Explanation: Sebaceous gland secretes sebum which is a chemical mediator that helps in lubrication and protection.
The sebaceous gland is present in skin and produces oil which is an endogenous mediator which provides a seal for the harmful microorganism so that they cannot the body through skin.
In this way it also protects the sweat gland which produces sweat.some of the bacteria that causes acne uses lipase to degrade sebum and causes infection.
Hence, the correct answer is option B
Answer:
They require light, and their net effect is to convert water molecules into oxygen, while producing ATP molecules—from ADP and Pi—and NADPH molecules—via reduction of NADP+. ATP and NADPH are produced on the stroma side of the thylakoid membrane, where they can be used by the Calvin cycle.
Explanation:please give brainliest
Explanation:
The DNA could be dried -through the process of lyophilization- or stored, as a precipitate of ethanol, in liquid nitrogen (temperatures below -80 degrees Celsius). The aim is to reduce water in the stored samples as much as possible because the water can be involved in natural hydrolytic reactions (depurination, depyrimidination, deamination, and hydrolytic cleavage) that could degrade the nucleic acids of the DNA.
If the DNA is stored while being used regularly it is not advisable to store it as a precipitate of ethanol. It should be stored in aqueous form but in a slightly alkaline pH of about 8.5 to prevent acid-catalysed degradation processes.
Learn More:
For more on DNA storage check out;
brainly.com/question/8841070
brainly.com/question/13435389
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Insecticide resistance is the development by insects of resistance to insecticides. It is the ability an insect can either get naturally or by mutations to withstand the effects of insecticides aka becoming resistant.
