Water add about 4°c is more dense than water at 0°c why would the living organisms in the lake die if the water at the frozen point was denser than the water at 4°c

Species can vary in several ways. which of the following is one of darwin's ideas that was accepted by most scientists of his time due to the large number of fossils being discovered at that time? a. species vary around the world. b. species have specific adaptations to their local environment. c. species that live in seawater can also live on mountains. d. species change over long periods of time.