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AysviL [449]
2 years ago
10

GIVING BRAIN-LIST TO THE CORRECT ANSWER!!!!!!!!

Biology
2 answers:
Zarrin [17]2 years ago
4 0
False. Advertisers are not a good course of scientific information because they are a biased source. Since their goal is to sell, you cannot trust the information they supply.
faust18 [17]2 years ago
4 0
The correct answer is false.

The advertisers goal is to sell whatever product they are selling, so they will say anything that will persuade the audience to buy it and not all of the information whether it’s scientific or not, can’t always be trusted.
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Which of the following is true of crossing over? It involves the exchange of chromosome segments between homologous chromosomes.
netineya [11]

Answer: All of the choices are correct.

Explanation:

<u>Meiosis is a type of cell division of the nucleus that occurs in cells that will give rise to gametes (egg or sperm).</u> These are haploid cells (n), that is, they possess only one chromosome of each of the pairs (23 in total). Through meiosis from a diploid cell (2n), four haploid cells are obtained, thanks to two successive divisions called meiosis I and meiosis II.  Both comprise prophase, metaphase,  anaphase and telophase.

Homologous chromosomes are a pair composed of a paternal and a maternal chromosome. They have the same DNA sequence arrangement from one end to the other, but different alleles. These chromosome copies have the same genes at the same loci where they contribute tips along each chromosome that facilitate a pair of chromosomes to align correctly with each other before they separate during meiosis. Sister chromatids are those that make up a chromosome after duplication of the genetic material.  

The homologous chromosomes of maternal and paternal origin, mate and this process is called "synapsis" and form what is known as a tetrad or bivalent chromosome, giving the impression that it is a chromosome with four chromatids. In these tetrads, junctions called chiasmata are formed, areas in which both homologues exchange genetic material or genes, a process known as crossing-over. The chiasmata allow the chromosomes to be held together until their separation in anaphase l. So, genetic recombination is the process by which a segment of genetic material from a maternal chromosome is cut and then joined to a paternal chromosome (or vice versa) during prophase I of meiosis. So it happens between non-sister chromatids of a paternal and a maternal chromosome.

<u>After crossing over, the homologous chromosomes are arranged randomly at the cell's  the equator of the cell at random (methaphase)</u>, facing each other, still united in the areas where crossing over occurred. Each chromosome is associated with a meiotic spindle fiber of the meiotic spindle and they are pulled along the meiotic spindle and driven toward the respective poles (anaphase). The chromosomes are now arranged at the poles and the reorganization of the nuclear envelope and the nucleolus begins. Finally, cytokinesis occurs and the rearrangement of cellular components and reorganization of the cytoskeleton. As a result of meiosis I,  2 haploid cells are obtained and then meiosis II occurs, where the sister chromatids are separated, generating two more cells (a total of 4).

Genetic variability is generated because the gametes produced during meiosis will not inherit the same chromosomes as the mother cell, but due to crossing over, the inherited chromosomes will be genetically different.

3 0
2 years ago
If schizophrenia were exclusively a genetic disorder, ________
Gre4nikov [31]
Anyone with Schizophrenia in his or her family history would develop Schizophrenia
8 0
3 years ago
List 3 benefits of the development of seeds and fruits.
Anna11 [10]

Explanation:

The fruits protect the seeds enclosed in the ovary. The seeds mature in the fruit by taking essential requirements.

The mature seeds retain the capacity of germination for a long period. It may be dispersed individually or along with the fruits to long distances by different agencies. The seeds germinate in the favorable conditions.

These are the advantages of fruits and seeds in the Angiosperms. These advantages help the spread of the Angiosperms in different climatic conditions. Thank you

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Answer "true" if the following terms are correctly paired. Use a dictionary, if necessary. lobster--vertebrate paleontology
m_a_m_a [10]

true. lobsters are vertebrates

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Stels [109]

Answer:

FLOODS:Floods are caused or amplified by both weather- and human-related factors. Major weather factors include heavy or prolonged precipitation, snowmelt, thunderstorms, storm surges from hurricanes, and ice or debris jams.

Explanation:

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