Biology, 23.11.2019 06:31 jeremiaht7

Which statement is true?
a. spiral and elliptical galaxies have gas and dust between stars while irregular galaxies do not.
b. spiral and irregular galaxies have gas and dust between stars while elliptical galaxies do not.
c. irregular galaxies have gas and dust between stars while elliptical and spiral galaxies do not.
d. elliptical galaxies have gas and dust between stars while irregular and spiral galaxies do not.

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Answer from: Quest

The answer would be c, white eyes are homozygous recessive. in the early 1900s, morgan conducted several experiments with vinegar flies (drosophila). one sample revealed an anomaly: a white-eyed, single male fly. he attempted to breed this fly with the typical red-eyed females. the offspring were all red-eyed. using flies from this new generation (brother-sister pairs) produced some red-eyed and a few white-eyed flies. the white-eyed were all male. in later experiments, he was able to produce white-eyed females. this proved that white eyes are not lethal to either sex (ruling out a and b). since the percentage of white eyes to red eyes is so low, white eyes are not a dominant trait. it would be a recessive trait.

Answer from: Quest

Answer:

it provides an alternative energy pathway for the reaction to proceed.

explanation:

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.

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Ribosome - small organelles composed of rna-richcytoplasmic granules that are sites of protein synthesis

Answer from: Quest

the cover letter for a job search includes the skills one has for the particular job. including a cover letter is always a good idea, as it describes the ability to perform a task, and the employer can easily fetch the intention of the job you want to do.

the cover letter is very important to be included in the job search document. hence, i strongly with the statement.

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Which statement is true?
a. spiral and elliptical galaxies have gas and dust between stars w...