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sdas [7]
3 years ago
6

Why do you think mutations are necessary for species to change?

Biology
1 answer:
Artist 52 [7]3 years ago
8 0
Mutation is the primary cause of all genetic variation. Mutation is important as the first step in evolution, as it produces a new sequence of DNA for a particular gene, producing a new allele. Recombination, through intragenic recombination, may also generate a new DNA sequence (a new allele) for a particular gene.
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Human blood types are characterized by the presence absence of surface markers known as a tigers on the surface of red blood cel
zalisa [80]

Answer:

characterized by presence or absence of antigens

the blood types are A, B, O, AB

Explanation:

There are two antigens and two antibodies that are mostly responsible for the ABO types.  The specific combination of these four components determines an individual's type in most cases. Erythrocytes and serum were related to the presence of antigens on these erythrocytes and antibodies in the serum. these antigens  are A and B, and depending upon which antigen the erythrocytes express, blood either belonged to blood group A or blood group B. A third blood group contained erythrocytes that reacted as if they lacked the properties of A and B, and this group was later called "O" blood group. The fourth blood group AB, was added to the ABO blood group system. These erythrocytes expressed both A and B antigens.

Blood group   Antigen present on RBC    Antibodies in serum    Genotype(s)

      A                        antigen A                             anti-B                     AA or AO

      B                        antigen B                             anti-A                     BB or BO

      AB              both A and B antigen                 none                         AB

      O                           none                           anti-A and anti-B           OO

4 0
3 years ago
According to the phylogenetic tree, which domains are more genetically related?
quester [9]

Answer: The correct answer is- Archaea and Eukarya.

As per the information about the (phylogenetic tree) given in the question,

the last branch of the phylogenetic tree begins with the line of Eukarya and then holds the species of the Archaea division, which includes those prokaryotic organisms that live in extremely harsh environmental conditions ( such as Methanobacterium, and extreme halophiles).  

As this last branch holds species of two domains ( from 3 domain system of classification that includes Bacteria, Archaea, and Eukarya) , which are Archaea and Eukarya as it begins with Eukarya and later on holds the species of Archaea.

Thus, it shows that Archaea and Eukarya are more genetically related.

3 0
3 years ago
In what phase of meiosis are tetrads pulled to opposite poles of the cell?
VikaD [51]

Answer:

Anaphase I

Explanation:

In anaphase I, the homologous chromosomes are pulled apart and move to opposite poles.

7 0
2 years ago
Which zone of the ocean is most hospitable to life?
yaroslaw [1]
The epipelagic zone<span> of the ocean is most hospitable to life.</span>
7 0
3 years ago
Read 2 more answers
What is the term used to identify a molecule responsible for reducing the amount of
Travka [436]
An enzyme. An enzyme is a protein speed up a biochemical reaction. It’s a catalyst.

Hope this helps :)
4 0
2 years ago
Read 2 more answers
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