The answer is an enzyme.
When cutting DNA, scientist uses enzymes called restriction enzymes. These enzymes are naturally produced in bacteria as a defense against phages. So, enzymes cut DNA of the phages and thus inactivate it. Also, these enzymes do not cat DNA randomly, but on specific sites. This characteristic of restriction enzymes is used for some molecular biology techniques. All species' DNA contains target sites of restriction enzymes, but most organisms do not have restriction enzymes. Therefore, restriction enzymes are suitable for different techniques.
The answer is; producing a unique antibody from all other B cells by genomic rearrangement.
An isolated B cell produces monoclonal antibodies (also called Immunoglobulins). Different B cell types produce different types of antibodies (hence the serum of an animal has polyclonal antibodies). Memory B cells are developed when a particular infection is eradicated by the immune system. These B cells proliferate when the infection returns by producing the same antibodies that were effective against the foreign entity.
The correct answer is "southerners." Sarah and Angelina Grimké's parents were slaveholders; while Sarah and Angelina never experienced slavery themselves, they viewed it firsthand, and from their own experience decided to advocate against slavery. This decision carried so much weight because overall, southerners didn't want to give up slavery.
The study is called Ecology
Answer: C. cropping patterns
Explanation:
Cropping pattern can be defined as the area in which the different crops grow at different times of the year. It also consider the spatial arrangement and time used to grow a sequence of crops that are grown in a particular area of land.
The given situation is indicative of the cropping patterns as different crops are grown in the same land over particular period of the year.
