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SVEN [57.7K]
3 years ago
14

Further microscopic analysis of negatively stained specimens reveals a colorless ring around each of the spherical cells against

a dark background. This clearing indicates that the pathogen possesses which structure(s):________. a. endospores. b. a capsule. c. nucleoid. d. pili.
Biology
1 answer:
Tanya [424]3 years ago
7 0

Answer:

b. a capsule

Explanation:

The capsule is mainly made up of polysaccharides and surrounds many bacteria. Capsule staining includes mixing of the bacterial cells with dye and spread out in a thin film on a slide. After air-drying, the cells appear as light-colored structures present in a relatively dark blue-black background. This occurs since the dye particles cannot penetrate either the cell or its capsule. Therefore, the given slide with a colorless ring around the cells in a dark background represents the presence of a capsule around the observed cells.

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El pelo rizado en los perros, domina sobre el pelo liso. Calcular el porcentaje del fenotipo de los descendientes de una pareja
creativ13 [48]

Answers:

el pelo rizado en los perros domina sobre el pelo liso. una pareja de pelo rizado tuvo un cachorro de pelo tambien rizado y del que se quiere saber si es heterocigótico ¿ con que tipo de hembras tendrá que cruzarse?

4.6/5

296

El cachorro puede ser "Aa" o "AA". Se quiere saber si es "Aa". Para eso, tendría que cruzarse o con un homocigoto recesivo (aa), puesto que es el que da un 50% de probabilidades de que los hijos sean de pelo rizado.

Entonces, si se cruza con un homocigoto recesivo, la probabilidad de la descendencia debería ser 2 cachorros de pelo rizado y 2 cachorros de pelo liso.

La hembra tendría que ser de pelo liso para asegurarse de que sea homocigoto recesivo.

Si todos los cachorros salen con el pelo rizado, entonces el padre es homocigoto "AA".

Si al menos uno sale con el pelo liso, entonces el padre es heterocigoto "Aa"

6 0
3 years ago
LOOKING CLOSER
kari74 [83]

Carbon and Hydrogen atoms share an electron pair, forming covalent bonds special properties of carbon is ability to form double and triple bonds.

<h3>What is molecule example?</h3>

A molecule is the smallest unit of any material that is composed of one or more elements and is capable of existing independently while maintaining all of the substance's physical and chemical properties. Further atom division occurs within molecules.For instance, each atoms the particle of oxygen are represented by the letters Oh and Water vapour, together.

<h3>How a molecule is formed?</h3>

When ionic compounds come together and form bonds with one another, a molecule is created. Each atom shares an electron when a bond is formed between them. A molecule is created as a result of a covalent bond.

To know more about molecule visit:

brainly.com/question/28931982

#SPJ1

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1 year ago
Why is carbon considered tetravalent? A. Since it has four electrons in its outermost orbital, it needs four more electrons to c
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The answer to this question is c since it has 4 electrons to outermost orbital it can donate 4 electrons
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