What is the purpose of a dichotomous key?
А
to locate an organism
B
to identify an organism
С
to divide a kingdom
D
to interbreed species

Answers

Answer 1

Answer:

B. to identify an organism

Explanation:

-

Answer 2
B


I did this in middle school

Related Questions

Not really sure about this answer so can someone give me the correct one​

Answers

It is the third circle. :)

What stage of mitosis is depicted by the image above?
O metaphase
telophase
O prophase
O anaphase
cytokinesis

Answers

Answer:

telophase

Explanation:

because the chromatids are pulled to the opposite sides

helppppppppppppp im stuck

Answers

Answer:

Ecosystem

Explanation:

Ecosystems are the largest organizational level found in one coral reef

definicion de cromatidas

Answers

each of the two threadlike strands into which a chromosome divides longitudinally during cell division. Each contains a double helix of DNA.

How are hydrogen bonds related to polarity?

Answers

Answer:

Water molecules forming hydrogen bonds with one another. The partial negative charge on the O of one molecule can form a hydrogen bond with the partial positive charge on the hydrogens of other molecules. Water molecules are also attracted to other polar molecules and to ions

Explanation:

True or False; Carbohydrates and Lipids are organic, contain CHO and are both forms of energy

Answers

This must be true i guess

Of 1217 offspring produced in a cross of one variety of plants, 919 had violet flowers and 298 had pink flowers. What is the trait in this cross?

Answers

Answer:

The trait is the color of the flowers.

Explanation:

Due to technical problems, you will find the complete explanation in the attached files

Which of the following prefixes represents the smallest value?

A. Centi
B. Deca
C. Deci
D. Mega

Answers

Answer:

centi

hope this helps

have a good day :)

Explanation:

centi means hundredth(100)
deca means tenth(10)
deci mean one tenth(0.1)
mega means one millionth(1,000,000)

So the smallest value and the correct answer is deci, one tenth(0.1).

Which is a feature of DNA that could allow you to distinguish between a DNA sequence that is protein coding and a DNA sequence that is not

Answers

Answer:

Protein-coding sequences are single stranded; others sequences are double stranded.

Refer to the following information to answer the questions below. A man who is an achondroplastic dwarf with normal vision marries a color-blind woman of normal height. The man's father was 6 feet tall, and both the woman's parents were of average height. Achondroplastic dwarfism is autosomal dominant, and red-green color blindness is X-linked recessive. They have a daughter who is a dwarf with normal color vision. What is the probability that she is heterozygous for both genes

Answers

Answer:

Considering the whole progeny ⇒ the probability of having a girl heterozygous for both genes is 4/16 = 1/4 Considering only girls ⇒ the probability of having a girl heterozygous for both genes is 4/8 = 1/2Considering only dwarf girls with normal color vision ⇒ the probability of having a girl heterozygous for both genes is 4/4 = 1

Explanation:

Due to technical problems, you will find the complete explanation in the attached files.

"Draw a pedigree for hitchhiker’s thumb. Your pedigree should cover at least two generations and include both dominant and recessive forms of the trait. Label the pedigree with genotypes, using the letter H to represent the dominant allele for the trait and the letter h to represent the recessive allele."


I'm confused on the part about having two generations. How do I set up the pedigree?

Answers

Answer and Explanation:

First, you need to know how to interpret a pedigree representation.

Family members

→ Individuals are represented with geometrical figures.

→ Males are squares

→ Females are circles

Trait/Phenotype

→ Healthy/normal/not affected  individuals are represented with empty figures

→ Affected/mutated individuals are represented with solid black figures

Generations

→ Each file is represented with a roman number, indicating the Generation.

 

Now, what we need to do is to draw a pedigree for a hitchhiker’s thumb. We know that this is an autosomal dominant trait, which we will represent with an H. No hitchhiker's thumb is the recessive trait, and it will be represented with an h.

Our pedigree should cover at least two generations and include both dominant and recessive forms of the trait.    

We can cross two heterozygous individuals, Hh, who are the first generation in our pedigree. This cross will result in a woman and a man with No hitchhiker's thumb, another man with a hitchhiker's thumb, HH, and another woman with a hitchhiker's thumb, Hh. These individuals will represent the second generation in the pedigree. Finally, we can cross the man with No hitchhiker's thumb, hh, with a woman who does not have a hitchhiker's thumb either, hh. And the woman with a hitchhiker's thumb, Hh, with a man with a hitchhiker's thumb, HH. The result of these crosses will be the third generation.

The representation would be like following,

I → First-generation: First cross

Man Hh (1)  Woman Hh (2)

II → Second-Generation: F1 and second crosses

Man hh (3)  x    Woman hh (4)Woman hh (5)Man HH (6)Woman Hh  (7) x   Man HH (8)

III → Third-Generation:

A boy (9) and a girl (10) hhA girl (11) HH

You will find this pedigree in the attached files. In this example, we included three generations. The first one belongs to the grandparents, the second one to parents, aunts/uncles, and the third one to grandchildren.  

If you draw another pedigree, remember to include

the figures representing males and females, color and H/h representing the phenotype, Roman numbers representing the generations, and optional, numbers naming each member.

stions
Describe what a muscle fiber looks like and what it
can do.

Answers

Answer:

Smooth muscle fibers have an oblong shape, much like a football. They’re also thousands of times shorter than skeletal muscle fibers. Similar to skeletal muscles, cardiac muscles are striated. They’re only found in the heart. Cardiac muscle fibers have some unique features.

Explanation:

An object at ___ stays at ____ or an object that is ____ at a _____ in a straight _____ keeps moving at that _____ unless another _______ acts on it.

Answers

Answer:

an object at rest stays at rest or an object that is moving at a velocity in a straight line keeps moving at that velocity unless another force acts on it

A __________ is an example of a signal molecule that can bind to an intracellular receptor and thereby cause a gene to be turned on or off. a protein b glyceride c nucleic acid d steroid e carbohydrate

Answers

Answer:

D. steroid

Explanation:

Intracellular receptors are a type of receptors located inside the cell, specifically in the cytoplasm or nucleus. When intracellular receptors are activated by ligands called SIGNALLING MOLECULES, they change shape and regulate genetic expression in the nucleus i.e. they induce turning on and off in a gene.

However, signalling molecules that activate intracellular receptors are usually hydrophobic hormones because they need to easily diffuse through the cell membrane and bind to the receptors located internally. Example of these hydrophobic signal molecules are STEROIDS.

Plant and animal cells are classified as what type of cell?
A. eukaryotic

B. prokaryotic

Answers

The answer is A I believe so

Why does the kidney need 1 million nephrons instead of one whole unit to carry out its function

Answers

The kidneys are a pair of bean-shaped organs on either side of your spine, below your ribs and behind your belly. Each kidney is about 4 or 5 inches long, roughly the size of a large fist. The kidneys' job is to filter your blood.

Why do you think leaves have stomata on their underside only? Explain.

Answers

The stomata must be open during the daylight hours to let oxygen and carbon dioxide pass through. While they are open, water vapor escapes into the atmosphere (transpiration). ... Transpiration is the loss of water through stomata, so, more stomata are found on the lower surface to prevent excessive loss of water.

In a lotus plant, stomata is found on the upper epidermis of the leaf.

Stomata are responsible for the exchange of gas with the surrounding atmosphere of the leaf. Their guard cells stay taut during the day to keep the stoma open.

Guard cells can only stay open if they are saturated with a certain quantity of water.

From this information we can infer that stomata are typically found on the lower epidermis to prevent water damage when it rains.

The rain would not only cover the openings, it would also ruin the osmotic balance of the guard cells causing inefficiency and damage to the cycle of gaseous exchange.

Natural selection probably selected against such plants giving rise to those with stomata on the underside.

Which answer best illustrates evolution by natural selection?
(2.9 points)
A. Ancestors' legs grew longer from climbing to escape predators.
OB. Ancestors that had longer legs could not produce more offspring.
O c. Ancestors wanted longer legs to escape predators and therefore grew longer legs
OD. Ancestors with longer legs escaped predators more easily and lived to produce more offspring.

Answers

Answer: A

i know this because i have taken this before

Can someone help me pls

Answers

Answer:

respiratory and circulatory digestive and excretorydigestive and circulatory nervous and muscular
Taking in gasses and moving them through the body is respiratory and circulatory

Processing nutrients and expelling waste from the body is digestive and excretory
Taking in nutrients and moving them through the body is digestive and circulatory

Processing and responding sensory informations is nervous and muscular

Which of the following words would you probably NOT use to describe the scientific process?

.control
.organized
.data
.disorganized

Answers

i believe it is “disorganized,” but i’m not completely sure; it sounds normal to have organized data

The words that would probably not used to describe the scientific process is disorganized, i.e., option D.

What is scientific process?

The scientific method is an epistemological method of acquiring knowledge that has been used in science since at least the 17th century.

The words that would probably not used to describe the scientific process is disorganized.

Thus, the correct option is D.

For more details regarding scientific process, visit:

https://brainly.com/question/16172865

#SPJ2

Please help me answer the following question.

Answers

Answer:

1a and 4b equals -59

rufjjfjvufjf

I think it’s

1.) e
2.) b
3.) d

What is the molecule in this image?
amino
acid
amino
acid
A. A carbohydrate
B. A nucleic acid
C. A protein
D. A lipid

Answers

Answer:

C

Explanation:

because it is a polymer of amino acid so it will be a protein

hope it make sense:)

If you conducted the analysis portion of Experiment 2, you calculated
the rate at which the percentage of fish with a complete pelvis
decreased in that ancient lake. Do you think the same rate of change
would apply to modern fish populations?

Answers

Answer:

ibk- xuqe- wup

only show type person come

Explain why DNA Sequencing proves that all species have a common ancestor

Answers

Answer:

Below

Explanation:

The reason why we can conclude that all species have common ancerstory is that all the species have several same base pairs. Here are a few listed:

A-G-G-C

As well as this later on:

C-C-A-A-C-C

Because this strand of DNA has several common base pairs, we can conldude that the species have common ancestory that made it this way.

Hope this helps!

Which is the main material in a solar cell?
A. carbon
B. phosphorus
C. silicon
D. boron

Answers

Answer:

C.Silicon

Explanation:

By far, the most prevalent bulk material for solar cells is crystalline silicon (c-Si), also known as "solar grade silicon". Bulk silicon is separated into multiple categories according to crystallinity and crystal size in the resulting ingot, ribbon or water.

Answer:

C. silicon is the main material in a solar cell .

hope it is helpful to you

What would be the complimentary side of this DNA molecule?
TAG CCA TTG CGT GCC TGG CAAT

Answers

No clue. So sorry… I need points….

List the three items that must be included in the definition of mass extinction

Answers

Ordovician-silurian Extinction: 440 million years ago.
Devonian Extinction: 365 million years ago.
Permian-triassic Extinction: 250 million years ago.

The _____ of a species is usually the result of predation, competition, and other types of interaction between species.

Answers

Answer: Realized Niche

Explanation:

Realized niche is also referred to as Post Competitive niche and can be defined as a thriving environmental area created by a group of organisms to survive from an exsisting Faundermental  niche where interactions (predation, competition, light, water,food) with other organisms were limited and competed for.  

For example. In a tree( Faundermental niche) which houses different species of birds, In order to survive, each specie of the birds will create a realized niche so as to survive from predation, competition, light etc which the whole tree provides.

¿Cómo defines a una Célula Haploide?

Answers

Answer:

La mitad de cromosomas.

Explicación:

Las células haploides se refieren a aquellas células que tienen la mitad de cromosomas. Estas células haploides se forman debido a la división celular de la meiosis. En la división celular de la meiosis, una célula madre se divide en cuatro células hijas que tienen la mitad de cromosomas. Estas células haploides están presentes en los espermatozoides de los gametos masculinos y femeninos, que se fusionaron formando células diploides que tienen el doble de cromosomas. El cigoto formado debido a la fusión de espermatozoides y óvulos son de naturaleza diploide.

The anticancer drug Taxol was originally extracted from the bark of the Pacific yew tree. This drug is an example of a type of ecosystem service known as

Answers

Answer:

Provisions

Explanation:

It's most likely Provisions because Provisions is an example of a type of ecosystem service.

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