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Lilit [14]
2 years ago
10

Which biome is characterized by a layer of permafrost?

Biology
2 answers:
Vinil7 [7]2 years ago
7 0
The biome that is characterized as a layer of permafrost is the Arctic Tundra 
LiRa [457]2 years ago
5 0
The Tundra is characterized by a layer of permafrost.
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Which unit of measurement is used in the metric system?
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The metric system uses meters to describe distance, which is comparable to a yard in the imperial system (the one we use). Inches, miles, and gallons are all units of the imperial system, and would be centimeters, kilometers, and liters in the metric system.
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Explain how the muscles pectoralis major and serratus anterior show two different ways in which muscles are named.
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3 0
2 years ago
Briefly describe how lateral inhibition increases apparent contrast at edges. In your response be sure to discuss the role of li
rusak2 [61]

Answer and Explanation:

The retina covers the internal phase of the eye. It characterizes by its complex interaction between many morphologically and functionally different cells, which are located in many layers. The principal processing mechanism in the retina is lateral interactions among cells, and the most common lateral processing is lateral inhibition.

Photoreceptors are those cells that receive the light and translate the luminous signal into an electrical signal. These are the cones and sticks.

The horizontal cells intervene in the lateral spatial interaction between photoreceptors.      

Bipolar cells receive information from the photoreceptors and from the horizontal cells and transmit it to the most internal layers in the retina.

The retina is stratified into five layers. One of these is the external plexiform layer, a contact zone between photoreceptors, horizontal cells, bipolar cells, and other cells.    

In the vertebrates´ retina, the lateral inhibition is produced for the first time in the external plexiform layer, through the horizontal cells. These cells connect to photoreceptors, other horizontal cells, and bipolar cells. The connection between horizontal cells might reduce or amplify the photoreceptor answer, and this last one is transmitted by the bipolar cells to the interior of the retina. In photoreceptors, there are two connections to horizontal cells, a direct connection, and an indirect one. The connection between photoreceptors, horizontal cells, and bipolar cells is known as lateral inhibition. By this inhibition, photoreceptors allow the contrasting perception in an image. Lateral inhibition allows discriminating one stimulus from other stimuli, by enhancing contrast and definition. The inhibitory modulation is produced by the inhibitor neurotransmitter GABA.The spacial extension of lateral inhibition changes according to the adaptation to light. Gap junction between horizontal cells and between photoreceptors and horizontal cells might vary with the amount of light.                      

4 0
2 years ago
Which of the following is a scientific question the student might ask?
Neporo4naja [7]

Answer:

<em>The correct option is C)  How does sunlight affect a model of a biogeochemical cycle?</em>

Explanation:

A scientific question can be described as a question based on which a hypothesis can be made and observations and experiments can be performed. The results from these experiments and observations would account for the validation of a hypothesis. Hence, a scientific question should be a question based on which a hypothesis can be made and experiments can be performed.

In the option C, the sunlight might increase or decrease various processes of the biogeochemical cycle. We can hypothesize and perform experiments to get the results. Hence, it is a scientific question.

4 0
2 years ago
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