The period of time during which an "explosion" of fossilized animals with bilateral symmetry are first found is the:

1 answer:

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<span>The Cambrian. The Cambrian Explosion, which began roughly 545 million years ago, was a relatively rapid (~5-10 million years) diversification of multicellular life, including most of the animal phyla currently extant today. This was an evolutionary arms race of sorts, with many creatures achieving both larger size as well as symmetrical bodies and various structural supports, including skeletal systems. It was also a highly experimental times in terms of evolution, as many forms of creatures arose and went extinct in rapid succession during this period.</span>

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You have identified two mutants with same phenotype.

algol13

Answer:

No, there are multiple ways in which different mutations in the same gene can cause the same phenotype

Explanation:

Several different mechanisms of mutation can lead to the same phenotype. For example, lets say our phenotype is that flies have white eyes, and we know that this occurs in one particular gene that normally makes the eye colour red. (the red gene)

These mutations likely rendered the red gene ineffective (as the eyes are not red). However, this could happen in a variety of ways.

There could be a single base deletion in the first exon of the mRNA, changing the reading frame of the protein and messing up the entire sequence (a frame shift mutations)
The entire gene could be deleted
A single base could be substituted in an important site of the gene, for example, one which translates into a catalytic residue or binding site in the protein
There could be an inversion at the promoter region of the gene, such that a transcription factor can no longer bind to transcribe the gene.

There are countless other ways in which a mutation could have been caused. Therefore, just because we know the same gene is affected does not mean that we can assume the mutations are identical.

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3 years ago

According to the results for Patient 1 shown above, which antigens were present in Patient 1’s blood? Check all (if any) that ap

soldier1979 [14.2K]

Answer:

Explanation:

Patient 1 has Type A blood because agglutination occurs due to reaction with anti-B. We know that A blood group has antigen A and it is anti-B means that they attack on B type of blood cells while on the other hand, B blood group has antigen B and it is anti-A means that they will attack on the A type blood cells upon mixing. So according to the chart, there is nothing happens by reaction of the blood with anti-A whereas agglutination occur by reaction with anti-B so we can say that the patient has type A blood.

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What is most influenced by the amount of organic material?

zavuch27 [327]

SOIL TEXTURE .....................

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Haase D, Germing U, Schanz J, et al. New insights into the prognostic impact of the karyotype in MDS and correlation with subtyp

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We have produced a huge, novel data set that incorporates morphologic, clinical, cytogenetic, and follow-up information from 2124 patients with myelodysplastic conditions (MDSs) at 4 organizations in Austria and 4 in Germany. Cytogenetic examinations were effectively acted in 2072 (97.6%) patients, uncovering clonal anomalies in 1084 (52.3%) patients.

Numeric and underlying chromosomal irregularities were reported for every patient and partitioned further as indicated by the quantity of extra anomalies. Along these lines, 684 unique cytogenetic classes were distinguished. The effect of the karyotype on the normal flow of the illness was concentrated on in 1286 patients treated with steady consideration as it were.

Middle endurance was 53.4 months for patients with ordinary karyotypes (n = 612) and 8.7 months for those with complex inconsistencies (n = 166). A sum of 13 uncommon irregularities were related to great (+1/+1q, t(1q), t(7q), del(9q), del(12p), chromosome 15 inconsistencies, t(17q), monosomy 21, trisomy 21, and - X), middle (del(11q), chromosome 19 peculiarities), or poor (t(5q)) prognostic effect, separately.

The prognostic significance of extra anomalies differed significantly relying upon the chromosomes impacted. For all World Health Organization (WHO) and French-American-British (FAB) order framework subtypes, the karyotype gave extra prognostic data. Our examinations offer new experiences into the prognostic meaning of uncommon chromosomal irregularities and explicit karyotypic mixes in MDS.

To learn more about prognostic impact of the karyotype in MDS from the given link

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1 year ago

Mountain lions kill and eat various organisms, such as rabbits. The presence and movements of mountain lions influences where ra

nevsk [136]

The mountain lion is a predator and the rabbit is a prey

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4 years ago

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