Mendel crossed yellow-seeded and green-seeded pea plants and then allowed the offspring to self-pollinate to produce an F2 generation. The results were as follows: 6022 yellow and 2001 green (8023 total)
The allele for green seeds has what relationship to the allele for yellow seeds? A) dominant
B) incomplete dominant
C) recessive
D) codominant
C
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Loud sounds cause temporary hearing loss due to damage to the:
a. eardrum b. auditory nerve c. cilia of the hair cells d. middle ear bones e. outer ear
Which statement would not be supported by Darwin's concept of evolution?
a. A population of wolves produces 500 offspring in an environment capable of supporting only 450. b. A population of plants adapted to dry conditions survives a draught and reproduces, while another population best adapted to rainy weather dies and becomes extinct. c. The offspring of three different female bears compete for the same food source. d. All children in the same town are genetically different. e. Five generations of farmers have warts on their hands.
Which of the following statements about speciation is correct?
A) The goal of natural selection is speciation. B) When reunited, two allopatric populations will not interbreed. C) Natural selection chooses the reproductive barriers for populations. D) Prezygotic reproductive barriers usually evolve before postzygotic barriers. E) Speciation is included within the concept of macroevolution.
Once photons are harvested by the pigment molecules in the light-harvesting complex, where is the energy delivered next?
a. the lumen of the thylakoid b. the outer membrane of the chloroplast c. the reaction center of the photosystem d. the stomata of the leaf