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zepelin [54]
3 years ago
8

Where do scientist believe that homo sapiens sapiens first appeared between 150000 and 200000 years ago?

Biology
1 answer:
8_murik_8 [283]3 years ago
5 0
Homo sapiens means wise human being, it one of several species grouped into the genus Homo, but it is the only one that is not extinct. It is the specie where all human beings belong. They replaced Neanderthals during 30,000 BC. Scientists believe that Homo sapiens appeared in Africa between 150,000 and 200,000 years ago.
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The element fluorine's outermost energy level can hold eight electrons. Study the diagram of fluorine, and then determine if the
Bingel [31]
<h2>The answer is False</h2>

Explanation:

  • Fluorine is a Chemical element. Its symbol is F. Its atomic number is 9. Fluorine is a lightest in nature. It is a diatomic pale yellow gas.
  • Except helium, neon and argon, fluorine is highly reactive to react with other elements.
  • The reason for it is false, because the outermost energy level of fluorine is not filled.
  • Fluorine becomes stable, when it forms an ionic bond with another atom.
3 0
3 years ago
For a species with a diploid number of 26, indicate how many chromosomes will be present in the somatic nuclei of individuals th
zhuklara [117]

Answer:

<h2>Haploid=13</h2><h2>triploid=39 </h2><h2>tetraploid=52</h2><h2>trisomic=14 </h2><h2>monosomic=12</h2>

Explanation:

Given;

A species with a diploid number of 26,  so 26= 2n ( a diploid cell),

so in haploid condition, chromosome number becomes half (13 in this case). triplod is when 2n + n, and 2n +2n ( tetploid). Trisomy and monosomy is the addition or deletion of a sinlge chromosome of a sinlge set  .

Haploid=13, one chromosome from each pair of chromosome set,

triploid=39 (13× 3); diploid+ n( 3n)

tetraploid=52 (13× 4) 4n

trisomic=14 (13+1) ; n+1

monosomic=12 (13-1); n-1

7 0
3 years ago
A friend of yours loves hamsters. He has brown, red, and white hamsters.
Likurg_2 [28]

Answer:

breed the red hamsters with blue eyes in hopes of getting their babies and sell them.... I have no idea what else you could do lol.

7 0
3 years ago
Read 2 more answers
Which reaction would you employ to build a disaccharide from two monomers of glucose?
GenaCL600 [577]

Answer:

D. dehydration synthesis

Explanation:

Dehydration means removing water, and synthesis means building or creating something. Therefore, the synthesis of dehydration is defined as removing water to build something. This process occurs by removing a molecule of -OH (hydroxyl group) and a molecule of -H to form H2O or water. This results in the covalent bonding of two monomers (small molecules) to form a polymer (larger molecule).

Dehydration synthesis uses condensation in the process and when this continues for a long period of time, a long and complex chain is formed, such as those of disaccharide or polysaccharides. It is also responsible for storing excess glucose molecules as well as larger polysaccharides such as starch and glycogen.

4 0
3 years ago
How might our DNA separate Genes?
solmaris [256]

Answer:Un estudio de la Universidad de Barelona demuestra, por primera vez, cómo pueden separarse los genes a lo largo de los linajes evolutivos mediante el mecanismo de la retrotransposición, que es la síntesis de ADN a partir de ARN a través de la transcriptasa inversa.

Explanation:

6 0
3 years ago
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