Woese proposed a new classification system in 1990. What was different about his system?

Related Questions

• Describe the role of the American alligator as a keystone species
• How would a loss of chlorophyll most likely affect cellular respiration in plant cells? A. Less glucose will be available for energy production. B. The Krebs cycle will supply energy to all the cells. C. Carbon dioxide will be produced in chloroplasts. D. More glucose will be broken down by glycolysis.
• Which of the following is an example of organic matter? O A. Water, which is made of oxygen and hydrogen O B. Rocks, which are made mostly of oxygen and silicon C. Air, which is made mostly of oxygen, carbon, and nitrogen D. Sugars, which are made mostly of carbon, hydrogen, and oxygen
• Why did the English Crown pass the Tea Act? A. Tea was a popular drink of the Colonists and it was a way to generate revenue for the King. B. Colonists living in Boston needed money to finance the revolution. C. The Tea Act was to replace the Stamp Act.
• Which observation of a plant supports the inference that photosynthesis can take place? A) A strong, sweet smell B) A dry, rough texture C) A green color D) A smooth stem
• Darwin hypothesized that’s favorable traits spread through a species as ?
• why are people against non renewable energy ?
• Consider a cross between a plant heterozygous for the dominant traits of red flowers and wrinkled seeds (RrWw) and a plant homozygous for the recessive traits of white flowers and smooth seeds (rrww). We see the following phenotypic distribution in the offspring: - 43 with red flowers and wrinkled seeds - 7 with red flowers and smooth seeds - 9 with white flowers and wrinkled seeds - 41 with white flowers and smooth seeds The recombinant offspring are those exhibiting a combination of traits not found in either parent. This would be the 7 offspring with red flowers and smooth seeds (Rrww) and the 9 with white flowers and wrinkled seeds (rrWw). We identify these as recombinants because they display a mix of the dominant and recessive phenotypes for flower color and seed texture, which must result from crossing-over during meiosis in the heterozygous parent that leads to a new combination of alleles. Prior to crossing-over during meiosis, the heterozygous parent’s chromosomes would carry alleles configured as: - One chromosome with R (red flowers) and W (wrinkled seeds) - The homologous chromosome with r (white flowers) and w (smooth seeds) After crossing-over, the chromosomes could have segments swapped, leading to new combinations, such as: - One chromosome with R (red flowers) and w (smooth seeds) - The homologous chromosome with r (white flowers) and W (wrinkled seeds) The recombination frequency is calculated by adding the number of recombinant offspring and dividing it by the total number of offspring, then multiplying by 100 to get a percentage: Recombination frequency = (Number of recombinant offspring / Total number of offspring) × 100 Recombination frequency = ((7 + 9) / (43 + 7 + 9 + 41)) × 100 Recombination frequency = (16 / 100) × 100 Recombination frequency = 16% Since 1 map unit (m.u.) is equivalent to a 1% recombination frequency, the distance between the genes for flower color and seed shape is approximately 16 map units.
• Explain how amino acids form proteins.
• Pesticides, such as DDT, often have harmful effects on aquatic ecosystems. One harmful effect would be that these pesticides A) cause fish to become sterile and unable to lay eggs. Eliminate B) cause algae and plants to overgrow and pollute the water when they die. C) accumulate in animals and build up in toxic concentrations as they pass through the food chain. D) eliminate most of the algae and plants in the food chain, causing animals to starve, at higher levels of the food chain.