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Explain how Britain's rats and mice are becoming inceasingly resistant to pesticides designed to kill them?
If an organism is exposed to a small amount of a poison it may not die and instead, gradual exposure to the poison can lead to the organism building up a resistance to it. This resistance can sometimes get passed on to the offspring of the organism, as it is a useful evolutionary adaptation, consequently the offspring also become resistant to the poison.
What are the possible genotypes if you do a punnett square with one parent who is Homozygous dominant RR for being resistant to poison ivy and one parent who is allergic to poison ivy rr?
RR X rr 100% Rr Heterozygous resistant for poison ivy.
Do antibiotics cause bacteria to become resistant?
Yes, over use of antibiotics can cause bacteria to become resistant.
Are bearded dragons immune to poison?
No.Different creatures are more (or less) resistant to certain toxins and poisons. All creatures can be poisoned. You have to choose the right poison.
Can copper withstand weathering?
Copper is sufficiently resistant but alloyed become more resistant and strong.
What event enabled the rats to become resistant to warfarin?
Evolution, but by artificial selection, so to speak. Imagine a colony of rats. They all have very tiny differences in their genes, and as these differences neither help nor harm the rat, they are passed along to their offspring as normal. If someone tries to poison the colony with warfarin, many will die. If any rat's genetics give it a resistance to the poison, then these rats will survive, and pass the resistance genes onto their offspring. Some of these may even be more resistant, etc. So it can be that the entire colony is mostly unaffected by the poison.
How do antibiotics become resistant to antibacterial drugs?
By mutating
How has MRSA evolved?
It has become resistant to many antibiotics.
Does poison gets expired?
No, they become worst.
Fluoride makes the enamel on teeth more resistant to disease?
ADDITIONAL FLUORIDE IS A POISON - - - YOU CAN FIND NORMAL AMOUNT IN DRINKING WATER
Is It possible to become immune to poison ivy and If so how?
No.
How do cockroaches become resistance to insecticde?
Just like most insects, cockroaches become resistant to insecticides because the resistant ones of the group are the only ones to survive. Thus, the trait which made them resistant is carried on through breeding with the other resistant ones. That's why farmers must constantly switch up the insecticides they use.
