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puteri [66]
3 years ago
10

1.List 2 examples of positive feedback loop in you body

Biology
2 answers:
IrinaVladis [17]3 years ago
8 0

1. In the positive feedback system, the stimulus is enhanced by the output of the feedback system. For example – child birth is a positive feedback in which oxytocin released during the labor intensifies the contraction and ripening of fruit.  

2. In the negative feedback system, the stimulus is dampened by the output of the feedback system. For example – Regulation of blood glucose levels and osmoregulation.  

musickatia [10]3 years ago
7 0

positive feedback could be contractions(as painful as it may seem, its true) in child birth and the ripening of fruit.


negative feedback  include the regulation of blood glucose levels and osmoregulation

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Answer:

parasitism,

Explanation:

parasitism, relationship between two species of plants or animals in which one benefits at the expense of the other, sometimes without killing the host organism.

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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
melisa1 [442]

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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