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umka21 [38]
3 years ago
13

Por es necesaria la duplaciacion del material genetico en la mitosis

Biology
1 answer:
SIZIF [17.4K]3 years ago
5 0

Answer: D

Explanation: just did it on edg

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A scientist was observing a specimen under a microscope. He obtained the specimen from pond water. He observed that the specimen
exis [7]

Answer:

The correct answer is : ciliophora is the phylum.

Explanation:

Ciliophora is a phylum which comprise organism of ciliates groups. Ciliates are protozoans found in aquatic or near aquatic conditions. These organism have egg like body in shape however some have different shape. The major characteristic feature is cilia, a hair like structures present on the body of these organisms.

They have cell with cytoskeleton, cilia, two different types of nuclei.The hair like structure called cilia used for collecting food and movement or locomotion.  

Thus, the correct answer is : ciliophora is the phylum.

6 0
4 years ago
1. clumped population dispersal ___ resources
SOVA2 [1]

Answer:

compete

limited growth rate

logistic

Explanation:

8 0
3 years ago
Northern elephant seals were hunted to the point that their population size was reduced to as few as 20 in the late 1800s. Since
tino4ka555 [31]

Answer:

C) Population bottleneck reduced genetic diversity, as the gene pool of the 30,000 elephant seals resulted from the few alleles present in the 20 bottleneck survivors.

Explanation:

<u>The correct answer would be that population bottleneck reduced genetic diversity, as the gene pool of the 30,000 elephant seals resulted from the few alleles present in the 20 bottleneck survivors.</u>

A sudden decrease in the population of an organism as a result of disaster or any other factor leads to a population bottleneck - a decrease in the genetic variability of the population.

<em>The decrease in the available number of alleles in the population limits the amount of genes that natural selection can influence.  Hence, as the population keeps increasing, the genetic diversity of the entire population rarely changes because the few alleles present in the population keep recombining.</em>

The correct option is C.

4 0
3 years ago
Explain how a change in the amino acid sequence of the FXR1 protein can decrease the ability of the protein to bind to RNA.
galina1969 [7]

Answer: The amount of proteins which is forming the SDS-resistant aggregates is isolated and purified by using the PSIA-LC-MALDI proteomic approach9 specially made for brain tissues.

Explanation: It is known as a regulatory mechanism through which the variations in the incorporation of the exons into mRNA gives  the production of more output which is to related protein, thus results in expanding possible genomic outputs.

Amyloids are the β-sheets-rich protein fibrils which can cause neurodegenerative and other incurable human diseases trapping  millions of humans across the world.

RNA molecules which are colocalized with FXR1 in cortical neurons are insensitive to the treatment with RNase A.

FXR1 also colocalizes in cortical neurons using the amyloid-specific dyes

FXR1 is also known to make different forms of RNA molecules and affects their stability and translation efficiency17.

To determine the binding energy  of FXR1 with mRNA, the brain cryosections were hybridized with biotinylated poly-dT.

7 0
3 years ago
Which one of the principles posits that heritable characteristics that provide a survival or reproductive advantage are more lik
Serggg [28]

Answer:

Natural selection

Explanation:

The action of natural selection consists in selecting individuals more adapted to a given ecological condition, eliminating those disadvantaged for that same condition. The most appropriate expression refers to the greater probability of a given individual surviving and leaving descendants in a given environment.

Natural selection acts permanently on all populations. Even in stable and constant environments, natural selection acts in a stabilizing manner, is present, eliminating deviant phenotypes. However, the environment does not represent a constant and stable system, either over time or over space, which determines different interactions between organisms and the environment.

Natural selection is the principle that postulates that hereditary traits that provide a reproductive or survival advantage are more likely than alternative traits to be passed on to subsequent generations and are therefore chosen over time.

8 0
3 years ago
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