ar is a plant that grows in South Africa. European cattle etbla the 1830s ate th

Question

ar is a plant that grows in South Africa. European cattle etbla the 1830s ate the leaves of the European cattle that were brought to South Africa plant and died. Scientists later learned that the plant produces uoroacetic acid, which interferes with an enzyme in the Krebs cycle. 39. You would correctly hypothesize that gifblaar plants now produce fluoroacetic acid because their ancestors a) produced fluoroacetic acid and produced fewer offipring than those that did not produce fluoroacetic acid bì evolved ways to produce more carbon dioxide in the Krebs Cycle than other plants c) produced the acid and fewer were eaten than plants that did not produce fluoroacetic acid d) produced fluoroacetic acid and produced more offspring than those individuals that did not produce fluoroacetic acid e) Both (c) and (d) are correct hypotheses 41. The critical element(s) of Darwin's theory of natural selection is/are a) variations d) adaptation b) struggle for existence e) all of the above c) survival of the fittest 37. A population of hummingbirds lives on the coast of North Carolina. Hurricane winds carry a small number of these birds out to a small island off the coast. The genetic variation in the founder population is correctly expected to be that of the original population on the coast. a) equal to c) less than d) unrelated to b) greater than 38. A few birds of the founder hummingbird population feed on white-flowered plants, which they pollinate as they fly from flower to flower, brushing against the flowers as they feed. If on this island, a deadly disease kills most of the red-flowered plants, you would correctly predict that if the disease became a permanent part of the environment, then over thousands of years. a) white-flowered plants would become more abundant than red-flowered plants. b) feeding hummingbirds would pollinate the red-flowered plants less frequently than the white flowered plants c) hummingbirds that prefer white flowers would become more common than hummingbirds that prefer red flowers d) all of the above would occur e) (a) and (c) are the only correct answers

Explanation / Answer

39. The plants that produces fluroacetic acid were eaten fewer than that not producing because fluroacetic acid is toxicity to animals that eat them. Hence option C is correct.

41. According to Darwins Natural selection theory-

Each organism try to adapt and variations acquired.

Each organism struggle for their existance and nature will automatically allow survival of the fittest or mostly adapted. Option e is correct.

37. Greator than original due to reason that they try to adapt in newer environment and have variations. Option B is correct.

39.Option A and C both are right. White flowered plant are lesser eaten and there are no predators or lesser predators. And also are healthy.  

Humming bird preferring white flower will aboudant since a lot of food is available.

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