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Alina [70]
2 years ago
6

1. a) Two nerve cells are shown below. In the drawing, label an axon, a dendrite, and a nucleus. Also

Biology
1 answer:
Kaylis [27]2 years ago
6 0

A nerve cell consists of a cell body or soma, a main fiber (axon) and many small branches (dendrites).

<h3>What is a neuron?</h3>
  • A neuron or nerve cell forms the basic unit of brain and nervous system.
  • These cells receive stimulus from the external world, relay the information to brain and help to generate a response.
  • The neurons communicate with each other via special connections called synapses where they release neurotransmitter.
  • A typical neuron consists of a cell body (soma), dendrites (brings information), and a single axon (send information away from neurons).
  • The dendrites and axon branch out from the cell body.
  • Cell body contains nucleus and specialized organelles.
  • At the tip of axon are axon terminals where neurotransmitters are released to transmit signal across the synapse to other cell.

Learn more about nerve cell here:

brainly.com/question/14565855

#SPJ1

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Of the following examples, which is likely to contain plasma?
-BARSIC- [3]

Answer:

Lightning

Explanation:

The term plasma referred to that condition when the electrons are "freed" from their host atoms for a short time. It happens due to the high temperatures.

Lightning is a plasma because when a column of electrons moves from sky to ground, the air that it passes through lights up with energy. What we see as lightning is the air. In this air,  the electrons are excited and giving off light. We see it as a light.

From this brief discussion, we can say that as electrons become free and become excited and then give light, lighting is a plasma.

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4 years ago
DDT is an insecticide that was formerly used to control insects that would eat crops. It was banned from use in the 1970s.
Reil [10]
<h2>It contains toxins</h2><h2>It killed off bird populations.</h2><h2>It caused harm to human populations.</h2>

Explanation:

Let us understand the term DDT

DDT : Dichlorodiphenyltrichloroethane

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  • Basically used for protecting insects eating crops
  • It is colorless, odorless, tasteless
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It killed off bird populations: Though it does not kill birds directly by consuming, it has indirectly damaged the egg by making the egg's shell too thin which gets broken easily.

It controlled diseases like malaria: Since this option talks about positive attribute of DDT, this option stands invalid. This chemical compound controls mosquitoes attacking the crop.

It caused harm to human populations: DDT causes vomiting, tremors or shakiness, and seizures

It contained toxins: It contains moderate toxins.

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