How to do a dichotomous key

Answers

Answer 1

Answer: I hope this helps you! :3

Explanation:

Step 1: List down the characteristics

Pay attention to the specimens you are trying to identify with your dichotomous key. List down the characteristics that you can notice. For example, say you are trying to classify a group of animals. You may notice that some have feathers whereas others have legs, or some have long tails and others don’t.

Step 2: Organize the characteristics in order

When creating your dichotomous key, you need to start with the most general characteristics first, before moving to the more specific ones. So it helps to have identified the more obvious and less obvious contrasting characteristics among the specimen before creating your dichotomous key.

Step 3: Divide the specimens

You can use statements (i.e. has feathers and no feathers) or questions (does it have feathers?) to divide your specimens into two groups. The first differentiation should be made on the most general characteristic.

Step 4: Divide the specimen even further

Based on the next contrasting characteristic, divide the specimen further. For example, first, you may have grouped your animals as have feathers and have no feathers, in which case the ones with feathers can be categorized as birds while you can further subdivide the ones that have no feathers as having fur and having no fur. Continue to subdivide your specimen by asking enough questions until you have identified and named all of them.  

Step 5:  Draw a dichotomous key diagram

You can either create a text-based dichotomous key or a graphical one where you can even use images of the specimen you are trying to identify. Here you can use a tree diagram or a flowchart as in the examples below.

Step 6: Test it out

Once you have completed your dichotomous key, test it out to see if it works. Focus on the specimen you are trying to identify and go through the questions in your dichotomous tree to see if you get it identified at the end. If you think the questions in your dichotomous key needs to be rearranged, make the necessary adjustments.


Related Questions

Which chemical compund is formed during photosynthesis ?

Answers

Answer: carbon dioxide / CO2

During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose

2. Why is this change in global temperature a concern

Answers

Past climate changes led to extinction of many species, population migrations, and pronounced changes in the land surface and ocean circulation. The speed of the current climate change is faster than most of the past events, making it more difficult for human societies and the natural world to adapt.

Cellular respiration concept map

Answers

Answer:

This cellular respiration concept map from Byjus might help you.

Explanation:

A cross where we follow the inheritance of 2pairs of alleles is called

Answers

The answer is: dihybrid. Let P = purple flowers and p = white, and T = tall plants and t = dwarf.

Which of the following is true about adaptation?

I. It is random.
II. It results from genetic mutations.
III. It only affects an individual in a population.

I, II, and III
I and II
II and III
I only

Answers

Answer: I and II

Explanation: so basically,  when adaptation occurs, it usually happens over a long period of time due to climate, predators, etc. because of these adversities,  Genetic mutations occur, helping that animal and its species as a whole survive, which checks number 2. number one is also correct because adaptation can not be predicted. it happens randomly at some point in time. 3 is incorrect because multiple offspring in a species could have adaptations that provide more of an advantage.

Question 5

Fossils are actually formed from minerals in the exact shape of the original bone

True

False

Answers

Answer: True.

Explanation: I took the test on K12 and received an A.

Which type of fish are sharks?
A. deep sea fish
B. cartilaginous fish
C. lampreys
D. bony fish
Please help!!

Answers

Answer:

B. Cartilaginous fish

Explanation:

Sharks have a cartilaginous skeleton. Cartilage is less dense than bone which allows sharks to move quickly through the water without using too much energy.

please help me what organism is the secondary consumer ?

Answers

Answer:

I believe it is the fox

Answer:

It would be most likey the worm dood.. most likely because he is a consumer that would gain his resources from the tree.

Explanation:

Explain why cellular respiration releases energy as an overall chemical reaction

Answers

Cellular respiration releases stored energy in glucose molecules and converts it into a form of energy that can be used by cells. Energy released during the reaction is captured by the energy-carrying molecule ATP (adenosine triphosphate).

Answer:

In cellular respiration, electrons from glucose move gradually through the electron transport chain towards oxygen, passing to lower and lower energy states and releasing energy at each step. The goal of cellular respiration is to capture this energy in the form of ATP

In other words:

Cellular respiration releases stored energy in glucose molecules and converts it into a form of energy that can be used by cells.

hope it helps x

please please please please give me your answer​

Answers

Answer:

1. living things can move.

2. living things can grow.

3. living things have sense. etc.

How do creosote plants defend against predators?

by growing in hard-to-reach places

by growing sharp, stinging hairs over their bodies

by producing bad-tasting oil in their leaves

by producing deadly toxins in stems and leaves

Answers

Answer:

The answer should be By growing sharp, stinging hairs over their bodies.

Explanation:

horse is called a vertebrate reason scienc subjects​

Answers

Answer:

Explanation:All animals with a backbone and skeleton are vertebrates. Horses have backbones and skeletons, therefore they are vertebrates. Animals without a backbone are called invertebrates. Hope this helps

What happens to ADP after ATP hydrolysis?

Answers

Answer:

ADP is combined with a phosphate to form ATP in tADP+Pi+free energy→ATP+H2O

Explanation:

The energy released from the hydrolysis of ATP into ADP is used to perform cellular work, usually by coupling the exergonic reaction of ATP hydrolysis with endergonic reactions.

The diagram below shows the eye, with several features labeled



which part of the eye controls how much light enters the eye?
1. Α
2. B
3. C
4. C

Answers

Your answer would be B. The Iris :))

Explain how a mutation may affect the evolution of a species.

Answers

Answer:

Mutation is important as the first step of evolution because it creates a new DNA sequence for a particular gene, creating a new allele. Recombination also can create a new DNA sequence (a new allele) for a specific gene through intragenic recombination.

what is a primate

what is a primate ​

Answers

Answer:

depends what context

Explanation:

In terms of biology, a primate is a mammal of an order that includes the lemurs, bushbabies, tarsiers, marmosets, monkeys, apes, and humans. (distinguished by having hands, feet that are similar to hands, and forward-facing eyes, and, with the exception of humans, are typically agile tree-dwellers)

However in terms of religion, a primate is the chief bishop or archbishop of a province

(p.s check the dictionary!!) :)

Which statement describes the energy involved in diffusion?

Diffusion requires energy in all cases.
Diffusion requires energy only to move material in through the cell membrane.
Diffusion does not require energy in any situation.
Diffusion requires energy only to move material out through the cell membrane.

Answers

Answer:

Diffusion does not require energy in any situation.

Explanation:

Diffusion does not require energy because it is a form of passive transport.

What does the process of cellular respiration begin and end with?
a. oxygen, glucose
b. energy, glucose
c. glucose, energy
d. glucose, oxygen

Answers

Answer:

C. glucose, energy

Explanation:

Glucose is ‘raw material’ in cellular respiration. It passes through the glycolysis cycle, in the cytoplasm of the cell. This occurs in virtually all cells. In eukaryotic cells, with mitochondria, the product of glycolysis (usually pyruvate) is channeled to the organelle and pass through the Citric acid /Krebs cycle that produces even more ATPs than glycolysis.

The answer is C the guy above me is right

the autonomic nervous system controls
A. tying your shoes
B. Heart Rate
C. chewing a bite of food
D. using a fork

Answers

The answer will be :

B. Heart Rate

the answer is B heart rate

What is the most likely effect of this?
an increase in mutations in both bird populations
an increase in gene flow between the bird populations
an increase in genetic drift between the bird populations
an increase in mutations in the island population

Answers

Answer:

B. An increase in gene flow between the bird populations.

Explanation:

Answer:

B (gene glow)

Explanation:

an increase in gene flow between the bird population

what race does tachycardia affect the most?

Answers

Answer: Out of 3556 patients there were 2916 whites, 266 blacks, 248 Hispanics, 63 Asians, and 63 of another ethnicity.

Explanation:


Which region of the nephron is labeled in blue in the image?
Proximal convoluted tubule
Loop of Henley
None of the above

Answers

Proximal convoluted tubule is the part labeled from the above diagram of nephron.

What is nephron?

The nephron is the small microscopic structural and functional unit of the kidney. It comprises of a renal corpuscle and a renal tubule. The renal corpuscle is composed of a tuft of capillaries which is refer to as the glomerulus and Bowman's capsule. The renal tubule extends from the capsule.

Therefore, The proximal convoluted tubule is a portion of kidney nephron between the loop of Henle and the collecting tubule.

Learn more about nephron from the link below.

https://brainly.com/question/242658

Human Use of Land
Journal Activity Active
Prompt
How has human land use impacted the environment?
Read More >>

Answers

Decreased water quality, increased pollution, depletion of natural resources and global climate change are the results of human land use.

How human impacted the environment?

Humans impact the environment in many ways such as overpopulation, pollution, burning fossil fuels, and deforestation. Human activities triggered climate change, soil erosion, poor air quality, and undrinkable water.

So we can conclude that reduction of water quality, increased pollution, depletion of natural resources and global climate change are the results of human land use.

Learn more about environment here: https://brainly.com/question/17413226

1. What is the purpose of the lab? Lab for modeling water

Answers

Answer:

The purpose of a lab is to entertain people and also give them a better understanding of science and it also makes you have fun

Explanation:

I did it before

How are 2 different dogs breeds different from a species ?

Answers

no they are the same species just different breed, think of it like humans. does being light skin make you a different species? no

Answer:

The fact human skip them apart is crucial here. this is a commonly defined as "groups of interpreting natural populations that are reproductively isolated from other such groups."

Which of the following agricultural practices can cause ecosystem disruption?

Tiling soil
Storing crops
Slash-and-burn
Drip irrigation

Answers

Answer:

C.) Slash-and-burn

Explanation:

took the exam and got it right

1.You have an unknown piece of matter in front of you that you believe to be a piece of bark from a tree. First, how would you determine if the matter was organic or not? Second, what are two kinds of tests you could perform to indicate the material is plant matter rather than an animal?
2.You recently adopted a cat/puppy from a local shelter. What are some examples of at least THREE phenotypes it might have inherited from its parents, and what is at least ONE example of a genotype it might have inherited that ISN’T also a phenotype?

3.Think about your knee as a body part consisting of skin, ligaments, muscle, and nerve endings. If each of these components are epithelial tissue, connective tissue, muscle tissue, and nervous tissue respectively, then what would you say are the defining characteristics of each kind of tissue? What are the relevant parts of your skull as a whole that would fit each tissue type?
4.Based on the information in the unit and your own knowledge of biology, what are some examples of enzymes your body produces/parts of your body that use enzymes? What about hormones (hint: almost any part of your body that affects your mood is an example of a hormone!)?
5.When you drop oil into cup of water, why does it hold together instead of breaking up in the water? Name at least three common substances which are examples of lipids that relate to the following areas of life: driving, eating, and your own body.

Answers

Matter is organic if it has carbon atoms present in it.The two tests include photosynthetic and postembryonic tests.

The phenotypes include the following:Color of furSize of tailColor of eyes

What is Phenotype?

This refers to the physical and observable characteristics of an organism.

The genotype for having a white fur is an example in this scenario.The defining characteristics of each kind of tissue is based on their components and functions.The skull has bones, blood vessels and nerves which would fit each tissue type.The enzyme pepsin is produced in the stomach. Testosterone is a hormone produced in the male reproductive system.

Oil doesn't have any polar part and so for them to dissolve in water resulting in them floating.

The three common substances which are examples of lipids include:

FatsOilsWaxes

Read more about Phenotype here https://brainly.com/question/22117

Which of the following is not a primary understanding of the theory of evolution?

Populations evolve, not individuals.
New species can develop over a few generations.
Existing species can gradually change in a changing environment.
A new trait must be able to be passed on to the next generation.

Answers

Answer:

Populations evole, not individuals

Explanation:

During circumstances an entire species can change either by changing the environment, traits passed onto progeny, or in a few generations. It doesn't make sense for the Theory of Evolution would surround the fact populations of a species would evolve but not individuals.

please I need help immediately, describe an experiment to verify the living organisms in the soil.​

Answers

Answer:

Soil living organisms compromise from mammals (such as rats) to micro organisms (such as nematodes and protozoa). Soil organisms help in the modification of soil, and also in the decomposition of organic matter. However they can also pose as a treat to to some crops, as they are responsible for some plant diseases.

Explanation:

When living organisms breathe they give out carbon dioxide gas as a waste product. Carbon dioxide gas can be detected (identified) using a carbon dioxide indicator solution called bromothymol blue. To find out if there are living organisms present in the four different levels of soil takenfrom the deciduous forest.

(PLEASE ANSWER WILL GIVE 20 BRAINLEST)

Gene therapy is a form of ______

Answers

Answer:

Gene therapy is a form of Narration.

Explanation:

Gene therapy is an experimental form of treatment that uses gene transfer of genetic material into an individual's cell to cure the disease. The idea is to modify the genetic information of the individual's cell that is responsible for a disease, and then return that cell to normal conditions.

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