i have the answer and it says C
If they were to be no separation <span>of a pair of chromosomes during meiosis resulting in formation of a sperm or ovum with 24 chromosomes instead of 23.</span>
Mucus in our noses and respiratory tracts trap microbes and pathogens from entering our body. Wax also trap pathogens and other foreign particles from entering our ears. Non-specific defenses are surface coverage defenses. T-cells target specific pathogens, which is a type of specific defense acted upon by our immune system.
Answer:
The lac operon in E.coli regulates genes that code for enzymes required
for breakdown of lactose. The lac operon is an inducible operon that is
activated in the presence of lactose.
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