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sasho [114]
3 years ago
5

Lon channels are not continuously open and are highly selective. (a) True (b) False

Biology
1 answer:
Svetach [21]3 years ago
5 0

Answer: True

Explanation: Ion channels are very specific and are voltage gated channels. They are highly specific and selective for particular ions only.

Example: Some of the channels allow the flow of potassium ions but do not allow sodium ions to cross the membrane to maintain the concentration.

Some of the positive ion channels allow only the movement of positive ions and no negative ions. These channels are not always open and opens only when there is a concentration gradient.

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Elements that are the border line of metals and non-metals.some elements near the stepped line have mixed properties of metals and non-metals these elements are called metalloid e.g. Silicon and Germanium

Explanation:

I hope this will help you:)

3 0
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6. Phylogenetic trees are used for?
ivolga24 [154]

Phylogenetic trees show the evolutionary pathways and connections among organisms. A phylogenetic tree is a diagram used to reflect evolutionary relationships among organisms or groups of organisms.

3 0
3 years ago
Beneficios y desventajas de la modificación genetica
finlep [7]
La manipulación genética representa todas aquellas técnicas que permiten modificar de forma directa los genes en el interior de las células de los organismos vivos. Estas modificaciones pueden ser a través de la inserción, la eliminación o la alteración de uno o más genes específicos. Todas las instrucciones que hacen que un organismo sea lo que es están codificadas en los genes, es decir que estos fragmentos de ADN son los que le indican a cada parte de las células y a cada célula en el cuerpo de un organismo multicelular o unicelular, qué debe hacer, cuándo y cómo. La manipulación genética es uno de los procesos científicos biotecnológicos más empleados hoy en día, ya que incluye todas las herramientas necesarias para modificar las características físicas de prácticamente cualquier ser vivo o, mejor dicho, de todo lo que tenga información genética en su interior (ADN o ARN).

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3 0
3 years ago
Hair color is a trait that’s controlled by many genes working together. Each gene contributes to this trait only in a small prop
omeli [17]

Answer:

tbh i think its D

Explanation:

i say its D cos why not and i dont have enough brain cells for this

3 0
3 years ago
Read 2 more answers
After getting the slide and microscope ready, Stella is eager to see the microscopic pond water specimen! She crouches around he
larisa86 [58]

Copied but correct answer.

Answer: C (She hasn't fastened the slide to the stage

Explanation:

In Microscopy even if the slide is not yet in focus,she will be able to see part of the slide which may appear as transparent image.Therefore this is a wrong answer.

If the microscope is not plugged it light can not come up.

If there are no specimen on the slide,the slide will still as transparent image at the focus.

No doubt Stella forgot to fasten the slide to the stage.,therefore the specimen on the slide was not in focus of the objective lens,rather she was focusing on the stage only,hence the visible white light.

7 0
3 years ago
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