how do current levels of plant and animal biodiversity on easter island compare with past biodiversity levels

Biology

1 answer:

-BARSIC- [3]3 years ago

7 0

Answer and Explanation:

Easter Island, a small island of around 64 square miles, has been a mystery for many scientists who study the changes on the past and current biodiversity abundance. According to research, this island used to be extremely diverse in species of fauna and flora, especially the latter. However, it is now composed of few species of invertebrates and little to almost no vegetation. This occured <u>due to the first colonizers</u> who rapidly deforested the region.

Research suggests that, apart from this deforestation, which caused the decline of wildlife species that depended on shrubs and palm trees, Polynesian colonisers introduced the Polynesian rat, which consumed almost all of the trees that were present in the island, leading to the absence of their regeneration.

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Quentin has blue eyes, blond hair, freckles, dimples and flat feet. which of these traits are polygenic?

inessss [21]

The answer is the first choice: Blue Eyes.

Polygenic traits are those controlled by two or more genes (hence the name "poly" in the term). Other examples would be skin color and height.

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8 0

3 years ago

Round seeds (R) are dominant to wrinkled seeds (r), and yellow seeds (Y) are dominant to green seeds (y). What is the expected p

asambeis [7]

Answer:

The correct answer would be- 1:1:1:1.

Explanation:

According to the question the cross between the two pea plants with the genotype RrYy and rryy where R for round seeds and r for recessive form that expressed wrinkled seed character. The other character of this dihybrid cross is the color of the seds Y for green and y for yellow seeds.

The cross is shown in the image attached that suggests that phenotypic ratio would be 1:1:1:1 as RrYy, Rryy, rrYy, and rryy.

Thus, the correct answer is : 1:1:1:1.