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Tanzania [10]
3 years ago
8

There are _____ phyla or categories of fish. 2 3 4 5

Biology
1 answer:
Nataly_w [17]3 years ago
4 0
There are THREE (3) phyla or categories of fish.

These phyla are:
1) Agnatha - jawless fish ; around 50 species in the world
2) <span>Chrondrichthyes - cartilaginous fish ; around 600 species in the world
3) </span><span>Osteichthyes - bony fish (divided into ray finned group and lobe finned group) ; around 30,000 species in the world. 
 

</span>
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3 years ago
Which of the following is not a step in the process of natural selection
Paraphin [41]

Answer:

A step that is not part of natural selection is people select which individuals breed and which ones do not.

Explanation:

Natural selection is a process in which favorable or unfavorable environmental conditions determine the evolution of species, producing differences in their genotype over a long period of time.

As its name indicates, it is a natural selection, in which no intervention by people is contemplated, so that <u>people cannot determine which individuals breed</u>.

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<em>The other options do form part of natural selection, since they are based on the three premises of this process: </em>

  • <em>Inheritable characteristics. </em>
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4 0
3 years ago
The process of meiosis increases genetic variation when genetic information is exchanged during crossing-over and when alleles a
postnew [5]
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