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NikAS [45]
2 years ago
10

Recent mass extinction

Biology
1 answer:
11Alexandr11 [23.1K]2 years ago
6 0

The most recent and arguably best-known, the Cretaceous–Paleogene extinction event, which occurred approximately 66 Ma (million years ago), was a large-scale mass extinction of animal and plant species in a geologically short period of time.
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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
In human pedigree if a symbol is fully filled what does it represent?
Ronch [10]

Answer:

See the answer below

Explanation:

<em>If a symbol is fully filled in a human pedigree, it means that the individual represented by the symbol is affected by the trait whose inheritance is being illustrated by the pedigree.</em>

The human pedigree generally represents a symbolic illustration of how a particular trait is inherited across generations in a particular family. It shows the relationship between the members of a family and how the trait is passed down each generation either in a silent or expressive form.

Individuals within a human pedigree are represented with symbols and <u>those affected by the trait in question are completely shaded</u>. <u>Those carrying the trait in silent form are half-shaded while those that do not have traces of the trait at all are left completely unshaded.</u>

8 0
3 years ago
How do enzymes help join two substrate molecules together to form a product?
Len [333]

Answer:

Enzymes bind with chemical reactants called substrates. ... In others, two substrates may come together to create one larger molecule. Two reactants might also enter a reaction, both become modified, and leave the reaction as two products. The enzyme's active site binds to the substrate.

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3 years ago
Can Frogs have neck​
Volgvan

Answer:

Frogs have skulls but don't have necks

3 0
3 years ago
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Semenov [28]

Answer:

Decodes the sequence of bases on the mRNA and then creates specifc proteins

Explanation:

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