Answer:
Many scientists favor the RNA world hypothesis, in which RNA, not DNA, was the first genetic molecule of life on Earth. Other ideas include the pre-RNA world hypothesis and the metabolism-first hypothesis. Organic compounds could have been delivered to early Earth by meteorites and other celestial objects
I would say A. CcSs ( sorry if it’s wrong)
Each cell has ______<u>(Sorry I don't know this one either)</u>______ genes activated depending on it's job and what kind of cell it is.
It is the presence of ____<u>Lactose</u>____ that causes the repressor protein to fall off and unblock the gene on the lac operon.
If a gene is turned on then it is being ______<u>expressed</u>______.
An additional circular chromosome found in some bacteria that is used in genetic engineering. Plasmid
Because carry out all the functions in the human body necessary for living. Proteins make up hormones that are required for living. Insulin - responsible for stabilising blood sugar. Haemoglobin - responsible for carrying oxygen around the body. Melatonin - responsible for helping us get to sleep. Adrenalin - responsible for the flight-fight-freeze response. There are many more but here are just a few.
