BIOL359 Lecture Notes - Lecture 5: Antibiotics, Stout, Antimicrobial Resistance
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Describe the theory of natural selection Which of thefollowing BEST describes the theory of natural selection? CHOOSEONE
1 The genetic make-up of apopulation gradually changes from one generation to the next. | |
2 Living organisms change overtime. | |
3 Each species produces many moreoffspring than can survive long enough to reproduce. The offspringthat do survive contain genes that are inherited from theparents. | |
4 There is variation among themembers of a species. Some of this variation is geneticallydetermined and so can be passed on to future generations. | |
5 Some individuals have genes thatincrease their chances for survival and reproduction. Theseindividuals are more likely to reproduce and pass on their genes,causing their genes to become more common in the nextgeneration. | |
6 There is a struggle for existenceamong the members of a population. |
Which of the following provides evidence for evolution?
All of these answers are correct |
Comparing DNA sequences between species |
Looking at the geographic distribution of similar species |
Comparing similarities in embryonic development between species |
Analyzing transitional fossils |
Which one of the following statements is true?
Natural selection works on non-heritable traits. |
Mutations only give rise to harmful traits. |
Natural selection works on variation already present in a population. |
Individuals evolve through natural selection. |
Which one of the following can create new alleles?
Genetic drift |
Natural selection |
Gene flow |
Mutation |
Which of the following is true concerning evolution?
An individual can evolve |
Genetic drift is a non-random part of natural selection |
An organism's fitness is determined by how long it survives |
Natural selection occurs through a change in allele frequency |
All living things need carbon. How does carbon enter the living portion of an ecosystem?
Atmospheric carbon dioxide taken in by photosynthesis. |
Atmospheric carbon dioxide taken in by soil bacteria. |
Elemental carbon taken in by plant roots. |
Elemental carbon taken in by cellular respiration. |
Elemental carbon taken in by cellular transpiration. |
The burning of fossil fuels:
Releases excess carbon dioxide into the atmosphere. |
Removes pollutants from the atmosphere. |
Was developed by scientists to combat global climate change. |
Has no effect on the carbon cycle. |
Is good for the environment |
__________ conducts water and dissolved minerals from the __________ to the ___________.
Phloem; roots; shoots |
Xylem; roots; shoots |
Phloem; shoots; roots |
Xylem; shoots; roots |
What is a disadvantage of growing traditional crops such as corn, soy or sugar cane for making biofuel?
they require lots of land and fresh water |
they take carbon dioxide out of the atmosphere |
they release oxygen into the atmosphere |
they release water through their stomata |
______ is the source of the oxygen gas released by a photosystem.
NADPH |
H2O |
C6H12O6 |
CO2 |
Chlorophyll |
Through what structure(s) do plants obtain most of their water?
interior cells |
stems |
leaves |
roots |
stomata |