It is estimated several million every year - it's impossible to count exactly because many will go unnoticed - they may be very small or happen in remote areas.
source https://www.google.co.uk/url?q=https://ds.iris.edu/ds/nodes/dmc/kb/questions/1/is-the-number-of-earthquakes-increasing/&sa=U&ved=0ahUKEwioxafr7YrUAhUiKsAKHXV9CosQFggXMAQ&usg=AFQjCNF6uKnsRqkmOkKYxE3WbwIAptWGUA
Transcription of the operon by RNA polymerase would not stop. This would, therefore, keep the genes in the operon
activated without repression. β-galactosidase, lactose permease, and lactose transacetylase enzymes would still
be produced by the bacteria even in a non-lactose medium.
The second image went through permineralization
The correct answer is 2.
The scientific knowledge is constantly growing. The main advantage of the scientific method is that nothing is absolutely true and unquestionable.
With each new hypothesis and experiment, scientists get a little bit closer to the truth about the natural world. Some parts of the scientific knowledge stand through time and new experiments only confirm them. But often, the new research finds new aspects or disproves parts of the previous finds, so the understanding of that phenomenon changes.