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katrin2010 [14]
3 years ago
6

In 2002, the fossil of a four-winged dinosaur was discovered in China and named a microraptor. What was the significance of the

discovery? It supported the idea that flight evolved from the ground up. It allowed scientists to reach a conclusion about the origin of flight. It enabled scientists to develop theories about the origin of flight. It provided clues for scientists to develop a hypothesis about the origin of flight.
Biology
2 answers:
zimovet [89]3 years ago
8 0

Answer:

It provided clues for scientists to develop a hypothesis about the origin of flight.

Explanation:

Gnom [1K]3 years ago
7 0

The answer is; It provided clues for scientists to develop a hypothesis about the origin of flight.

Scientists now postulate that dinosaurs are the ancestors of birds. This because the Microraptor is a dinosaur with feathers in all its limbs. It is also the smallest dinosaur to every been discovered and has been compared with the  Archaeopteryx (involving even genetic sequencing) to hypothesize how dinosaurs evolved into birds.


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Answer:

D. A, B, AB, or O

Explanation:

We can start by visualizing all the possible genotypes of the offspring by drawing a Punnett square, which is a visual representation of the different possible combinations of alleles:

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     A   O

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Here we can see that there are 4 possible genotypes: AB, BO, AO and OO based on the alleles of the parents. Now we can match the genotypes to phenotypes to answer the question:

A and B are codominant, meaning that both will be expressed equally if both are present. Therefore the genotype AB will result in an AB phenotype.

Next, since A and B are both dominant over O, they are the alleles that will be expressed in the phenotype if paired with an O. This means that the genotype AO will result in an A phenotype, and likewise, genotype BO will result in phenotype B.

Finally in the genotype OO, although O is a recessive allele, there are no dominant alleles here to mask them, therefore O is expressed in the phenotype.

Hence, from the genotypes AO and BO, the possible offspring genotypes are AB, BO, AO and OO, translating to the possible phenotypes: A, B, AB or O.

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<u><em>So (B) is your answer</em></u>

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