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ollegr [7]
3 years ago
12

Sedimental increases with an increase in land used for agriculture

Biology
1 answer:
matrenka [14]3 years ago
7 0

the answer to your question is true

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If nondisjunction occurs and and an individual survives which disorder can occur
daser333 [38]
If nondisjunction occurs and an individual survives, which disorder can occur? Chromosomal mutations can have a variety of effects on individuals. Klinefelter syndrome is a genetic disorder that occurs when a male has an extra copy of the X chromosome.
4 0
3 years ago
Which lipoprotein carries cholesterol to the cells in your body, but can get stuck in arteries while traveling in the blood, dep
Viktor [21]

LDL (low-density lipoprotein) carry cholesterol from the liver to the tissues and can contribute to the formation of plaque that builds up in the arteries.

<h3>What are lipids?</h3>

Lipids are soluble in fat and to circulate in the blood, which is an aqueous medium, they form lipoprotein complexes called lipoproteins, these constitute a transport medium and circulating reservoir for lipids.

<h3>Characteristics of LDL (low-density lipoprotein)</h3>

  • Low-density lipoproteins, composed of 50% triglycerides, are the ones that transport the lipids synthesized in the liver to other parts of the body.

  • LDL, composed mainly of cholesterol, when in excess, also deposits it on the walls of the arteries, contributing to the formation of plaque.

Therefore, we can conclude that excess LDL (low-density lipoprotein) poses a health risk because it facilitates the accumulation of fat in the arteries.

Learn more about lipoproteins here: brainly.com/question/16170788

5 0
2 years ago
HELP!! DUE TODAY
goldenfox [79]

Answer:

In the past decade, genetic testing aimed at identifying ancestry has experienced exponential growth, with nearly 26 million tests sold since 2018 (6). Companies – such as 23andMe – offer kits to trace your genetic legacy and geographical origins using Y-chromosome, mitochondrial, and whole-genome markers (1). Genetic ancestry testing holds the potential to identify the geographic origins of an individual’s ancestors, ancestral lineages, and relatives, but does not define a deterministic cultural identity.

DNA located in the mitochondrion, mtDNA, is inherited maternally in both sexes and can thus provide evidence of an direct, unbroken female lineage (10). The mtDNA typically passes unchanged from mother to offspring, except in the rare case of a mutation. By comparing full mtDNA sequence or assaying for particular haplogroups, it is possible to establish both close ancestry and rough global origins, respectively (4). Regardless, two individuals, even with an exact mtDNA match, may have had an ancestor as far back as ten or sixteen generations (9). Consumers should thus be warned against over-interpreting mtDNA results since they unravel a single thread in an individual’s genetic ancestry. A distinct benefit of mtDNA tests is the ability to distinguish maternal lineage in recorded genealogical data in which females adopt the male surname (10).

Contrary to mtDNA, Y-chromosome DNA is inherited paternally, passed down from father to son. Ancestry tests analyze locations along the Y chromosome, cataloging mutations known as single nucleotide polymorphisms and repeating patterns known as short tandem repeats (8). Test results can determine if two male members of separate families with the same surname have a close genetic relationship (10). In addition, a multitude of haplogroups, representing branching in the Y-chromosome tree, can be used to examine the presence of a common ancestor thousands of years back, contributing another thread to the central question of genetic ancestry (8,7).

A more comprehensive basis of determining ancestry relies on the presence of millions of autosomal variants, such as single nucleotide variants (SNVs), across the genome (10,3,7). An individual’s unique pattern of SNVs is compared with various reference populations and other consumers in order to infer their ancestry (10). Companies such as 23andMe provide a readout of broad ancestry and specific subgroups. Ancestral populations such as European and Western Asian are often further broken down into subpopulations (e.g. British, Greek, Iran). The accuracy of more specific statistical inferences is often variable, with companies examining different SNVs reporting inconsistencies in percentages for the same individual (3). In addition, since many reference populations do not account for migration and interbreeding thousands of years back, an ethnicity estimate with a high degree of confidence could still differ drastically from an individual’s expectations (10). Statistical inferences have diminished accuracy in regions such as East Africa and South Asia with comparatively limited data relative to well studied European populations, leading to further possible inconsistencies (7).

While the commercialization of genetic-ancestry tests has resulted in improved accuracy and innovation, the hyper-aggressive marketing of such products risks misinforming consumers, particularly in regards to cultural heritage. Consider, for example, an advertisement by the company Ancestry where a woman finds “[her] strength” after realizing she shares maternal lineage to a matriarchal people in Ghana (11). The pervasive marketing has even infiltrated music: In 2018, Spotify and Ancestry partnered to suggest playlists and artists based on test results, blatantly equating DNA and cultural heritage (2). While such marketing efforts are externally harmless, they carry a hidden message that DNA plays a meaningful role in our cultural identity. Most consumers are ill-informed in the field of genomic science, and may assume that their test results are deterministic and connote a contribution to heritage.

Genetic-ancestry tests may also perpetuate the idea of innate racial differences and entangle race with culture. A randomized trial reported that White Americans with lower genetic literacy had increased essentialist views after receiving test results (6). Those of Hispanic heritage share cultural aspects such as language, but may differ in genetic test results due to post-colonial admixture of Native, European, and African populations (5). Does a test result of 90% European heritage indicate “more” Hispanic heritage than 80% African? Such conclusions are entirely inaccurate and dangerous, but plausible given the genetic literacy of the typical consumer.

Explanation:

8 0
3 years ago
When two species occupy exactly the same niche, one species will be eliminated from the community by _____.
liubo4ka [24]

Answer:

Answer is B

Explanation:

Hope it helps

6 0
2 years ago
Stem cell technology has been useful in many ways. Which of the following would be the most likely use for stem cells?
Mashcka [7]

Answer:

To regenerate damaged tissue

Explanation:

Stem cells can be pluripotent, totipotent or multipotent depending on where they are sourced. This means that they are capable of differentiating into a wide variety of cells. Stem cells can, therefore, be harvested and induced to differentiate into cells or tissues that are intended to be repaired.

4 0
3 years ago
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