I desperately need help answering some questions on evolution…most questions that I’m having trouble with aren’t in my book and some are just confusing.
1.Which principle of natural selection is stated incorrectly
A. Individuals in a population show variations
B. Variations are not inherited from parents
C. Organisms have more offspring than can survive on available resources
D. Variations that increase reproductive success will be more common in the next generation
2. The fact that at least one species of resistant bacteria has developed for almost every antibiotic is evidence for which condition?
A. The bacteria have adapted and could be evolving into a different species
B. The bacteria could have learned to mimic other species
C. There is no variation in the bacteria population
D. The antibiotics are being made differently
3. Under what conditions might populations of a short type of sunflower be identified as a new species?
A. They are able to breed with sunflowers from the original population
B. They are unable to breed with the sunflowers of the original population
C. They appear as a new color
D. They produce twice as many blooms as the original sunflower population
4. In order for evolution to occur, what must happen in a population?
A. genetic drift
B. geographic isolation
C. natural selection
D. reproductive isolation
5. What is operating when unrelated species living in different parts of the world, but with similar niches, evolve similar traits?
A. convergent evolution
B. genetic drift
C. divergent evolution
D. parallelism
6. The Hardy-Weinberg equation is used to determine the frequency of which alleles in a population?
A. recessive alleles
B. hybrid alleles
C. dominant alleles
D. masked alleles
Would appreciate if someone could help answer as soon as possible…if you can answer only one question then at least that counts for something!
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Need Help On Evolution Fast!?
Posted on April 1, 2013.
1.Which principle of natural selection is stated incorrectly
B. Variations are not inherited from parents
2. The fact that at least one species of resistant bacteria has developed for almost every antibiotic is evidence for which condition?
A. The bacteria have adapted and could be evolving into a different species
3. Under what conditions might populations of a short type of sunflower be identified as a new species?
B. They are unable to breed with the sunflowers of the original population
4. In order for evolution to occur, what must happen in a population?
D. reproductive isolation
5. What is operating when unrelated species living in different parts of the world, but with similar niches, evolve similar traits?
A. convergent evolution
Sorry, don’t remember off the top of my head for this one …
6. The Hardy-Weinberg equation is used to determine the frequency of which alleles in a population?
A. recessive alleles
B. hybrid alleles
C. dominant alleles
D. masked alleles
For number 2, I’d say A.
For number 3, I’d say B.
I feel bad for you if you have these kind of questions.
1/ B
2/ A
3/ B
4/ C
5/ A
6/ B
1. B. Variations are inherited from parents. An example of variation, in humans, is eye colour. You inherit eye colour from parents.
2. A. the bacteria have adapted. Use the process of elimination for this. C & D aren’t true, antibiotics aren’t being made differently, and there must be variation in the bacteria, or else they’d be wiped out. B is unlikely.
3. B. A species a often defined as a group that is capable of interbreeding and producing viable and fertile offspring. If the new sunflower can’t breed with the original, then it is a new species. A new colour and twice as many blooms does not define a new species. Humans have different eye / skin colour, and some may have twice as much hair as others, but we’re all one species.
4. C, but could be D. It depends on the degree of evolution you’re talking about. Natural selection evolves species by removing individuals with unfavourable traits. Reproductive isolation would lead to speciation, a much higher degree of evolution.
5. A. Convergent evolution is when species not in the same location display similarities, due to similar favorable traits needed to survive and reproduce in an environment.
6. p^2 + pq + q^2 = 1. So if parents had alleles A and a, the capital being dominants, the small a being recessives, with known frequencies (so not A and C, as they must be known already) this equation predicts the number of offspring with AA, Aa, or aa alleles. The answer is either hybrid or masked, I’m not too sure.