How do mutagens affect chromosomes? athey change the chemical composition of dna, which can affect the structure or number of chromosomes. they attack the inner part of the chromosome, changing the sequence of dna in the centromere of the chromosome. they alter the size of the chromosome, which affects the way a chromosome passes genetic traits from parents to offspring.

Which element is used in photosynthesis found in atmosphere and fixed by bacteria?

Asmall number of finches are removed randomly from the wild and placed in a protected bird area. they are given as much food as they need and have plenty of space. why would natural selection not occur in this population? a. there is no reason for genetic mutation to occur. b. the birds compete for limited resources, c. the population has not reached carrying capacity. d. there is no genetic variation in the finches.

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.