What evidence shows that white dwarfs must be very small?

1 answer:

7 0

Spectral analysis proposes that there is no hydrogen fusion roughly speaking. They are hot since they are very thick. So if you are a convinced high density and temperature and still not doing synthesis, you must be small. Also, stellar evolution models are founded on the observation of planetary nebulae, where stars have shed most of their mass after being red giants. The physics designates a small, hot, central remainder.

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What evidence must be considered when determing whether or not a trait is an adaptation

fenix001 [56]

<span>An adaptation is a trait that "evolved" for a particular condition or circumstance that allows the animal to survive. Something is adaptive if it is a useful trait but not necessarily one that occurred in response to a particular selection pressure.</span>

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It has been recently determined that the gene for Duchenne muscular dystrophy (DMD) is more than 2000 kb (kilobases) in length;

castortr0y [4]

Answer. D

Explanation:

After the messenger RNA (mRNA) is formed, it has to go trough different steps before being translated into proteins, also known as maturation of the mRNA. One of the most important steps is splicing, a process that removes the introns (regions of the sequence that do not codify for any particular amino acid sequence or protein). In other words, the splicing process removes sequences that do not generate any protein, leaving only the exons to be translated into protein. However, the genes (within our DNA) will contain exons and introns; Therefore, the gene sequence will have more kilobases compared to mature mRNA as the introns in this macromolecule have been spliced out.

I hope this clarify your question .

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Yuri [45]

Answer: D

Explanation:

The lipopolysaccharides are found in the outer membrane of Gram-negative bacteria. Lipopolysaccharide is complex molecule consisting of a lipid and chains of carbohydrates. They are also called endotoxin, they are the major component of the outer cell membrane. Sugars in the polysaccharide chains of endotoxin confer serologic specificity. They lplay a crucial role in bacteria resistance to antibiotics.

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Liula [17]

The nervous system and the integumentary system<span />

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Given the parents AABBCc × AabbCc, assume simple dominance for each trait and independent assortment. What proportion of the pro

Anit [1.1K]

Answer:

3/4

Explanation:

If we assume simple dominance and independent assortment for each trait, we can use Mendel's Law of Segregation to predict the phenotypic proportions in the offspring of the parental cross AABBCc x AabbCc.

AA x Aa

F1 genotypes: 1/2 AA, 1/2 Aa
F1 phenotypes: all A

BB x bb

F1 genotypes: 1 Bb
F1 phenotypes: all B

Cc x Cc

F1 genotypes: 1/4 CC, 2/4 Cc, 1/4 cc
F1 phenotypes: 3/4 C, 1/4 cc

We want to know the proportion of progeny with all dominant phenotype (A_B_C_). Since the genes are independent, we can multiply the probabilities of each gene to obtain the overall probability of having a ABC progeny:

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2 years ago