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satela [25.4K]
4 years ago
9

1. What's the primary way that fungi spread and reproduce on Earth?

Biology
1 answer:
Natali5045456 [20]4 years ago
6 0

Answer:

1. The primary way that fungi reproduce and spread their species on Earth is through spores. These spores are carried by the wind or by other organisms.

2. The role of mycorrhizae in plants is that they live in the roots of plants and turn unusable matter into minerals and water for the plants. The plants also provide energy and a place for the mycorrhiza to live.

3. The three main substances that fungi convert into usable forms for other organisms are phosphorus, nitrogen, and carbon.

4. Fungi break down organic matter and convert it into usable nutrients.

5. It's helpful that fungi attack and kill other organisms that are parasitic because these parasitic organisms can wreak havoc on the ecosystem. The fungi help to protect other species and populations by controlling and curbing the growth of the parasitic organism.

Explanation:

Penn Foster

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En un cruce entre peces naranjas y peces grises se obtiene una generación (f1) de 50% peces grises . Realice el cruce y explique
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Answer:

Uno de los progenitores es heterocigoto para color naranja (Nn) y el otro parental es homocigoto recesivo para gris (nn). Al haber una cruza entre un homocigoto recesivo y un heterocigoto, la 50% de la progenie expresa color naranja (Nn), mientras que el otro 50% expresa color gris (nn).

Explanation:

<u>Datos disponibles:</u>

  • Cruce entre peces naranjas y peces grises
  • 50% de la F1 son peces grises
  • Naranja dominante sobre gris

Podemos nombrar el alelo dominante para color naranja <em>N</em>, y al alelo recesivo  para color gris <em>n</em>.

Para que en un cruce entre dos fenotipos distintos, el 50% de la primer camada exprese uno de estos fenotipos, entonces uno de los parentales debe ser heterocigoto, mientras que el otro parental debe ser homocigoto recesivo. De esta forma 50% de la primera generación expresara uno de los fenotipos, mientras que el otro 50% expresará el otro fenotipo.

Supongamos que uno de los parentales lleva el genotipo <em>Nn</em>, y el otro parental es <em>nn</em>.

Cruce:

Parental)      Nn    x     nn

Gametas)   N    n       n    n

Fenotipos) Naranja     Gris

Cuadro de Punnett)      N           n

                            n       Nn         nn

                            n       Nn         nn

F1)  2/4 = 1/2 = 50% de la progenie tendrá genotipo heterocigoto, Nn

     2/4 = 1/2 = 50% de la progenie tendrá genotipo homocigota recesivo,    

     nn

     50% de la progenie será color naranja (Nn)

     50% de la progenie será color gris (nn)

               

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Explanation:

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