Descent with Modification Video Lessons

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Problem: The Canary Islands are seven islands just west of the African continent. The islands gradually became colonized with life (plants, lizards, birds, etc). Three different species of lizards found on the islands are similar to one species found on the African continent (Thorpe & Brown, 1989). Because of this, scientists assume that lizards traveled from Africa to the Canary Islands by floating on tree trunks washed out to sea.Which statement best describes how traits in lizards will be inherited by offspring?a. When parent lizards learn to catch particular insects, their offspring can inherit their specific insect-catching-skills.b. When parent lizards develop stronger claws through repeated use in catching prey, their offspring can inherit their stronger-claw trait.c. When parent lizards' claws are underdeveloped because easy food sources are available, their offspring can inherit their weakened claws.d. When a parent lizard is born with an extra finger on its claws, its offspring can inherit six-fingered claws.

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The Canary Islands are seven islands just west of the African continent. The islands gradually became colonized with life (plants, lizards, birds, etc). Three different species of lizards found on the islands are similar to one species found on the African continent (Thorpe & Brown, 1989). Because of this, scientists assume that lizards traveled from Africa to the Canary Islands by floating on tree trunks washed out to sea.

Which statement best describes how traits in lizards will be inherited by offspring?

a. When parent lizards learn to catch particular insects, their offspring can inherit their specific insect-catching-skills.

b. When parent lizards develop stronger claws through repeated use in catching prey, their offspring can inherit their stronger-claw trait.

c. When parent lizards' claws are underdeveloped because easy food sources are available, their offspring can inherit their weakened claws.

d. When a parent lizard is born with an extra finger on its claws, its offspring can inherit six-fingered claws.

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Our tutors rated the difficulty ofThe Canary Islands are seven islands just west of the Africa...as medium difficulty.

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Our expert Biology tutor, Kaitlyn took 7 minutes and 19 seconds to solve this problem. You can follow their steps in the video explanation above.

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Based on our data, we think this problem is relevant for Professor Gerner's class at UARK.