Environmental factors can influence natural selection because they can increase or decrease ...
A. the number of chromosomes in a individual
B. the number of chromosomes in a population
C. the amount of genetic variation in a individual
D. the amount of genetic variation in a population

Need an answer asap 45 points and brainlest to the first person to answer why do scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record. must be in sentence form how can scientific theories on evolution and the fossil record change over time? must be in sentence form

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Which example describes a mutualistic relationship between organisms? young wasps prey on caterpillars. crabs eat the remains of dead fish. tapeworms feed on food in the intestines of cats ants protect a tree on which they feed.