24. The four requirements for evolution by natural selection are A. larger beaks

Question

24. The four requirements for evolution by natural selection are A. larger beaks, longer necks, more sperm, faster sperm B. trait variation, trait heritability, excess reproduction, and favorability of a subset of traits C. directional, stabilizing, diversifying, and disruptive selective forces D. allele novelty, stabilizing selection, drift, and non-random mating E. a struggle for existence, migration, gene flow, and mutation Questions below refer to the partial periodic table column: I II III IV V V?V? IVI Il He LI Be 12 13 14 15 16 17 18 Al SIP SCI Ar 25. Dee Max created a new radioactive isotope of oxygen in her lab. This isotope had to neutrons, two more than normal oxygen. What was the atomic mass, in Daltons, of Dee Max's radioactive oxygen? MaxwC.14 D. 16 E. 18 A.10 B.12 26. Dee found that the molecule broke down into 2 different elements, a form of carbon and a form of helium. The nucleus of the new carbon had 7 neutrons. What was the atomic weight, in Daltons, of the new helium? E. A. 3 C. 5 D. 6 27. Elements in which column are likely to form ions with a +1 charge in reactions with other elements? A.1 B.Il C. IV D.V?l E.VIII 28. Elements in which column are likely to form ions with a -1 charge in reactions with other elements? A.I B.II C.IVD. VII E. VIII 29. What stability is gained by the ions that formed in the previous two questions? C. a full (complete) valence electron shell D. a neutral atomic charge A. stable nonpolar covalent honds B. stability in their atomic nucleus 30. An element in which column (roman numeral) forms the basis for biological macromolecules based on which property (after the comma)? A. I, ability to donate electrons B. IV, ability to share 4 pairs of electrons C. VIII, non-reactivity D. VI, electronegative nucleus E. IV, electronegative nucleus 31. Water forms which type of bond between O and H leading to what fundamental property (after/) A. ionic bond//slow to heat up B. nonpolar bond//electrostatic attraction C. nonpolar covalent bond//frequent H-bonding ing to what fundamental property (after /N D.polar covalent bond// frequent H-bonding E. polar covalent bond/slow to heat up

Explanation / Answer

24.E.a struggle for existence, migration, gene flow, and mutation

25.E.18

Oxygen=16 atomic mass, 8 protons, 8 neutrons

The radioactive isotope of oxygen- Neutrons=10 and 8 protons

26.C.5

Helium had 3 neutrons and 2 protons= 5 Daltons

27.D.VII

The electronegative elements F, Cl, Br, I are likely to form ionic bonding with +1 charge ions

28.A.I

The metal ions, Na, Li likely to bond with -1 charge ions

29,C. A full (complete) valence electron shell

30.B.IV, ability to share 4 pairs of electrons

31,D,Polar covalent bond//frequent H bonding

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