l. What key idea did Jean-Baptiste de Lamarck state in a book he published? a. T
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l. What key idea did Jean-Baptiste de Lamarck state in a book he published? a. The Earth is older than 6000 years. b. Organisms change form over generations. c. The fossil record demonstrates extinctions over time. All living things are descended from a single common ancestor. d. 2. How would Darwin explain why redwood trees are so tall? The original group of redwood trees was tall and passed this trait on to future generations. a. b. Trees needed to grow tall to increase their exposure to sunlight c. Taller redwood trees reproduced more successfully than shorter redwood trees. d. Tall redwood trees consumed less energy than shorter redwood trees. 3. Evolution as described by Darwin occurs at which of these levels? cells b. organs individual organisms c. d. populations 4. Examining the DNA in different organisms that code for the same enzyme would represent what type of evidence for evolution? a. fossil record b. comparative anatomy c. molecular biology d. biogeography 5. Broccoli and cabbages are both descended from the same wild mustard and can still interbreed. The existence of these two vegetables is an example of a. speciation b. artificial selection. c. natural selection. d. genetic drift. e. inheritance of acquired characteristics. 6. Tasmanian devils are carnivorous animals the size of a dog that live on an island near Australia. An infectious fatal disease is decimating the Tasmanian devil population so much that it is predicted the species will go extinct within 20 years. What is the likely reason that Tasmanian devils are going extinct a. Gene flow increases differences in sub-populations. b. Mutations reduce variation in populations.Explanation / Answer
1. Answer : b. Organisms change form over generations.
His two theories are (1) use and disuse, and (2) inheritance of acquired traits. Organisms based on their use and disuse of particular trait, changes happen to the organism and that acquired traits get passed on to future generations.
2. Answer : b. Trees needed to grow tall to increase their exposure to sunlight.
Darwin's theory of natural selection explains adaptation to survive in a given environment by improving essential traits.
3. Answer : c. Individual organisms
Individual organism living in particular environment adapt to the environment and changes happen at the DNA level and nature selects the best individual from a group of individuals.
4. Answer : c. molecular biology. Comparison of DNA coding for same enzyme gives the similarities and differences at the genetic level.
5. Answer : b. artificial selection
Farmers selected particular trait from wild mustard and suppression of internode length gave rise to cabbage. Likewise, suppression of flower development gave rise to broccoli
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