A group of scientists are studying cod (Gadus morhua) populations in the Southern Gulf of St. Lawrence to see if they are increasing or decreasing in numbers. the scientists are using fish tag data compiled from a sampling series using the mark and recapture method. to estimate the number of cod in the area, the scientists captured 1,500 fish, marked them, and let them go. The next day, they captured 1,675 from the same area. Of these, 270 had been marked the day before. about how many cards are in southern Gulf of St. Lawrence?​

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.

Plants, sunlight, growth and artificial sunlight