Answer:
The lac operon is an operon, or group of genes with a single promoter (transcribed as a single mRNA). The genes in the operon encode proteins that allow the bacteria to use lactose as an energy source. coli normally metabolise glucose, but if glucose is not available in a new environment, the lac operon can allow E. coli to metabolise lactose, the sugar found in milk using the structural genes beta-galactosidase and lactose permease. The lac operon of E. coli contains genes involved in lactose metabolism. ... It normally blocks transcription of the operon, but stops acting as a repressor when lactose is present. The lac repressor senses lactose indirectly, through its isomer allolactose.
Explanation:
Paraphrasing is the act of rewording, revising, simplifying and expressing the text in your own words with additional clarity. Note that condensing the text to a shorter form should not be in your interests because that would be summarizing, not paraphrasing. Check this out:
Nonliving organisms and lifeless organisms are not the same thing. Inanimate organisms are not dead, they're nonliving. Being nonliving means not having a characteristic of life, it means that the object is inorganic. A valid example could be a rock. A rock has never had a characteristic of life. Being deceased means that life once inhabited the being and has left it. Just as a moose gains life from conception, it's deemed dead once life has left it. In science, nonliving organisms and lifeless organisms are not the same thing; one was gifted life and one was inanimate from the beginning.
Answer:
It transports food to all the parts of the plant both upwards and downwards is the correct answer.
Explanation:
Phloem is tissue present in plants that transport the food prepare in the leaves to other parts of the plant.
Phloem has various types of specialized cells such as parenchyma cells, sieve elements, sclerenchyma, and companion cells.
Phloem transfers the food from source(leaves)to sink(to the other parts of the plant's cells), and in the spring process get reversed as the food stored in the sink move towards the developing buds through the phloem that's the reason phloem transports food to all the parts of the plant both upwards and downwards and movement of food is bidirectional.
Answer:
I think it is true for 3 and false for 4 but i am 100% so i won't trust me fully so yeah.
Explanation:
Answer:
b. the blood transfusion was mismatched, and the recipient had previously been exposed to the blood group antigens of the blood transfusion.
Explanation:
Blood transfusion giving a patient blood or its equivalent product intravenously. Necessary tests are normally carried out to ensure the blood to be transfused matches and is compatible with the blood or body system of the recipient.
However when symptoms like difficulty in breathing, fever,nausea and vomiting is visible after ten transfusion then it’s obvious there was an error which involves blood transfusion being mismatched, and the recipient being previously been exposed to the blood group antigens of the blood transfusion
