Which of the structures illustrated in Figure 3.3 could not be formed by typical covalent bonds? A.
B.
C.
D.
E.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

the answer is b. glad to .

your spelling is a little off : ]