Answer: D
Explanation: This is because the coal has carbon dioxide and when it is released into the air it causes acid rain.
Answer:
The organs- thymus, tonsil, appendix and spleen constructs the lymphatic organ system and the lymph nodule is the collection of small lymphoid tissue.
Explanation:
The most significant part of immune and vascular system is the Lymphatic system. This system is consisted of some organs, like- spleen, thymus, tonsil and appendix, mainly named as lymphatic organs. These organs contribute to the function of defend in the immune system.
Lymph nodules, however, are the collective small lymphoid tissue. These nodules are found in the area that is exposed to microorganism and it helps in fighting them.
Tubular reabsorption is the process that moves back into the bloodstream the solutes and water out of filtrate. It is so called because this is the second time they have been absorbed in which the first time was when they were absorbed and transported from the digestive tract into the bloodstream. The substances travels from the filtrate of the proximal convoluted tubule and next to the LOOP OF HENLE.
The correct answer is: b. It is free to bind to another promoter and begin transcription
Transcription is the first step of gene expression in which DNA molecule is copied (transcribed) into RNA (mRNA) by RNA polymerase. The process of transcription is divided into three phases:
1. Initiation
• RNA polymerase with transcriptional factors bind to gene promoter
• RNA polymerase unwinds DNA double helix (transcription bubble is formed)
2. Elongation
• RNA polymerases adds nucleotides complementary to DNA
3. Termination
• RNA polymerase gets to stop codon (transcribes a sequence of DNA known as a terminator)
• Formed complementary RNA strand is released from DNA-RNA complex.
RNA polymerase is also released and can transcribe some other gene by binding to its promotor. RNA polymerase will transcribe just the genes whose products are needed at a particular moment.
