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gladu [14]
2 years ago
10

Name: Click or tap here to enter text. Date: Click or tap here to enter text. Graded Assignment Lab Report Create a dichotomous

key that identifies the 10 leaves on the Common Leaves sheet. Look closely at those leaf samples and devise a dichotomous key that helps you identify them. Be sure that your dichotomous key contains only pairs of statements about a single characteristic. For example, a pair of statements might be: A.leaf margin smooth B.leaf margin toothed However, you should avoid pairs of statements that do not address the same characteristic. The following pair, for example, would not be very informative in your key: A.leaf margin smooth B.leaf type needle-like As you develop your key, test it out with the 10 leaves provided on the Common Leaves sheet. When you've developed a key that identifies all 10 leaves, type your statements, “go tos,” and identifications, following the format in the example below. The example is based on this lesson’s dichotomous key for birds. Statement Types/Dichotomous key for birds Identification Name/Number of Leaves Statement 2a The bird has a crest of feathers on the top of its head. go to statement or identify bird blue jay Statement 2b The bird has a smooth head. go to statement or identify bird 3 Once you have completed your dichotomous key, answer the two remaining questions. When you are finished, submit this assignment to your teacher by the due date for full credit. Total score: Click or tap here to enter text. of 26 points (Score for Question 1: Click or tap here to enter text. of 20 points) 1.Complete a dichotomous key for the 10 leaves on the Common Leaves sheet. The chart provided here allows for 11 pairs of statements. Depending on how you build your dichotomous key, you may or may not need all of them, or you may need to add some. Statement Types/Dichotomous key for leaves Identification Name/Number of Leaves Statement 1a Click or tap here to enter text. go to statement or identify leaf Click or tap here to enter text. Statement 1b Click or tap here to enter
Biology
1 answer:
oksian1 [2.3K]2 years ago
4 0

Answer:

How to Make a Dichotomous Key

Explanation:

Step 1: List down the characteristics. ...

Step 2: Organize the characteristics in order. ...

Step 3: Divide the specimens. ...

Step 4: Divide the specimen even further. ...

Step 5: Draw a dichotomous key diagram. ...

Step 6: Test it out.

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In a reflex arc, after a sensory nerve signal is processed by interneurons in the integration center, the signal goes to the motor neuron. The answer is motor neurons.

<h3>What is the reflex arc?</h3>

The reflex arc refers to the sequence of events since the body receives an external stimulus until it reacts.

In general terms,

1) A stimulus of varying nature reaches the body.

2) The peripheric nervous system -PNS- receives the stimulus and sends this information to the central nervous system -CNS-.

3) The CNS processes the information and sends another signal as a response to the stimulus.

Five elements compose the reflex arc, which are receptors, three types of neurons, and effectors.

The neurons involved in the mechanism are:

• Afferent or sensorial neurons

• Interneurons

• Efferent or motor neurons

Mode of Action:

  • <u>Ascending branch</u>

The stimulus reaches the body and is received by the specialized sensory receptors.

Afferent neurons, placed in the dermis and epidermis, receive this information from receptors, react and send it to the central nervous system as nerve impulses.

  • <u>Descending branch</u>

Interneurons in the CNS, process the information and send a motor response.  

Efferent neurons carry the response from the CNS to the effector organs, which might be either a muscle or a gland.

Finally, the target tissue responds to the stimulus as a contraction -muscle-,or as hormones release -gland-.

A motor neuron is formed by a cellular body, dendrites (cytoplasmic extensions that receive stimuli from other cells), and a long axon that is capable of conducting the electrochemical signals.

The axon brunches out into several extensions when it approaches the muscle.

At the end of each brunch, the axon is inserted in the muscle fiber surface, composing neuromuscular join.

This is the last part of the NS involved in the process before the muscle contracts.

After a sensory nerve signal is processed by interneurons in the integration center, the signal goes to the motor neuron, and from there to the effector.  

The corrct answer is motorneuron.

You can learn more about the reflex arc at

brainly.com/question/894334

#SPJ1

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