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aliina [53]
3 years ago
10

The organism pictured belongs to the Class Chondrichthyes or the _______________ fishes.

Biology
2 answers:
Rasek [7]3 years ago
8 0

Answer: The correct answer for the blank is-

Cartilaginous fishes.

Chondrichthyes is a class of cartilagenous fishes. This means that they have their entire skeleton system made up of cartilages ( unlike bony fishes whose skeleton is made up of bones) as they are devoid of true bones.

This class of fishes have exposed gills that is there is no preotection of gill slits ( unlike bony fishes, which have protective membrane over gill slits). They bear toothlike placoid scales.

eduard3 years ago
6 0
<span>cartilaginous Is the word you can use to fill in the blank!</span>
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In a certain plant, tall stems (t) are dominant to short stems (t). a farmer crosses a short-stemmed plant with a heterozygous l
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The answers would be:

Genotype                Phenotype

     Tt                      Tall stemmed

     tt                       Short stemmed

Genotypic ratio : 2:2 or 1:1

Phenotypic ratio: 2:2  or 1:1  

<u />

<u>You can read on to see how this was done:</u>

Tall stems (T) are dominant to short stems (t).

First figure out the genotypes of the parents. We have a short-stemmed plant and a heterozygous long-stemmed plant cross.

For short stem to occur, you need 2 pairs of short alleles. So the first parent would have a genotype of tt.

Heterozygous long-stemmed means that the parent has one of each allele. So the genotype of the second parent would be, Tt.

Now we can make our Punnett Square.

tt x Tt

<u>       t        t  </u>

<u>T |  Tt  |   Tt</u>

<u>t  |   tt  |   tt</u>

Let's list down the genotypes and phenotypic results.

Genotype        no.         Phenotype

     Tt                 2           Tall stemmed

     tt                  2           Short stemmed

So from that we can answer the other questions:

Genotypic ratio : 2:2 or 1:1

Phenotypic ratio: 2:2  or 1:1  

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