On your laboratory test, you are presented with a mollusc that has a closed circulatory system. You know immediately that it must belong to the class ________.

Answers

Answer 1

Answer:

Cephalopoda

Explanation:

Cephalopods are the mollusk that has a closed circulatory system by simple circulation. The heart is located in the pericardic cavity and it is divided into two auricles and one ventricle. From the ventricle, the anterior aorta goes forward the head and the posterior aorta goes forward the visceral mass. The anterior aorta branches into many branchial arteries. All of them get united again in the head, in one cava vein from where the blood returns to the posterior extreme. This vein introduces into the pericardic cavity and brunches into two renal veins near the nephridium. Each branch penetrates into a nephridial sac and passes through the muscular branchial heart before it enters the gills.  Blood passes from the ventricle to the branchia through many vessels. In the branchia, the blood gets oxygenated again and returns to the auricle. The posterior aorta irrigates the gonads and the mantle, and from the posterior extreme of the body, blood goes forward to the anterior body region through two veins that join the renal veins that flow into gill hearts.      


Related Questions

Which formatting tasks can be carried out by using the Design tab under Table Tools? Check all that apply.

choosing the style of a table
changing the height of a row
increasing the width of a column
adding colored borders to a table
fixing the spacing of text in a table
adding borders to separate the cells

Answers

Answer:

Choosing the style of a table

Adding colored borders to a table

Adding borders to separate the cells

Explanation:

They are right!

The formatting task that could be carried out should be, Choosing the style of a table, adding colored borders to a table, Adding borders to separate the cells

Information regarding the table tools:

The formatting that could be carried out should be selecting the table style should be adding the colored borders, adding the borders for separating the cells. But it can't be changing the row height, column width increment, etc.

Find out more information about the cells here: brainly.com/question/5763151?referrer=searchResults

An animal cell left and a plant cell right are shown which two cell parts are most likely found in both types of cell

Answers

Nucleus
Mitochondria
Ribosome

What biomolecules are important components of cell membranes?

Answers

Answer:

Lipids

Explanation:

Protei
Using what you have learned about carbon bonds
and energy in this lesson what can you say about
the amount of carbon bonds in this food
component compared to the amount of carbon
bonds in the other two food components? Why?
I
RETRY

Answers

Answer:

The correct answer would be -

Fat produce greater energy than the carbohydrates and protein.

due to the facts fats and proteins both have carbon bonds

Explanation:

Fat have highest number of carbon bonds in comparison of the amount of the carbon bonds present carbohydrate and protein and similarly protein have greater number of carbon bonds

Digestion of the fats provides the most energy per gram, due to the fact that more carbon bonds to break. Protein as well gives the higher energy per gram if compared to carbohydrates.

Thus, the correct answer is -

Fat produce greater energy than the carbohydrates and protein.

due to the facts fats and proteins both have carbon bonds

Answer:

Fat

Explanation: (answer for second part)

The amount of carbon bonds in fat is much greater than the amount in carbohydrates and proteins. Fats give you the most energy per gram, so there must be more carbon bonds to break, thereby releasing more energy.

What is physical science

Answers

the sciences concerned with the study of inanimate natural objects, including physics, chemistry, astronomy, and related subjects.

Answer:

Physical science can be described as all of the following:

A branch of science (a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe).

A branch of natural science – natural science is a major branch of science that tries to explain and predict nature's phenomena, based on empirical evidence. In natural science, hypotheses must be verified scientifically to be regarded as scientific theory. Validity, accuracy, and social mechanisms ensuring quality control, such as peer review and repeatability of findings, are amongst the criteria and methods used for this purpose. Natural science can be broken into two main branches: life science (for example biology) and physical science. Each of these branches, and all of their sub-branches, are referred to as natural sciences.

Source: https://en.wikipedia.org/wiki/Outline_of_physical_science

Hope this helps ma dude!  

Pick one level of organization smaller than an organism,
and describe how that level works with the others to support
the organism and keep it alive.

Answers

Answer:ddndbdjd

Explanation:d

Hdbdndndnmddkjdjdjdidd

Seeing is believing. Do you agree or disagree with the statement above? Be sure to explain your reasoning and use examples from this lesson to support your view. connect to: the ideas of atomic theory, the scientists who helped develop atomic theory, the tools and techniques that were used to study matter, the conclusions that were, drawn from the study of matter, Then, examine the statement.

Answers

Answer:

I disagree.

Explanation:

For many years the phrase "Seeing is believing" has been propagated as a way to question and verify the information that reaches us. "Seeing is believing" reflects an evidential thought, where something must be witnessed and touched to be credible. We cannot agree with that.

Agreeing with this phrase is a way of denying all the scientific and technological advances that humanity has gone through. This is because there are countless things that could be scientifically proven and that we cannot see, such as DNA, atoms, molecules, RNA, among others. Atoms, for example, were proven through scientific techniques and devices that were modernized and allowed us to reach a conclusion without being able to see the atoms, but knowing that they are real.

We must not be denialists, especially in scientific matters, because science is one of the main factors for the advancement of society, without scientific advancement there is no progress.

Therefore, we must motivate the phrase "Seeing is believing" to "Proving is believing", which is very rational and coherent.

Describe the function of each organelle. Nucleus Ribosome Endoplasmic reticulum Golgi apparatus

Answers

Answer:

Nucleus- Contains the cell's DNA; the control center of the cell

Ribosome- Synthesises proteins

Endoplasmic Reticulum- makes lipids and other materials for use inside and outside of the cell; breaks down harmful substances; transportation within a cell

Golgi Apparatus- processes and bundles macromolecules like proteins and lipids as they are synthesised

The Golgi apparatus is where the ribosomes of the ER produce proteins, which are then packaged in a membrane made of lipids and exported from cells. Charged molecules are held in the Golgi before being released and entering the cytoplasm (secretory vesicles).

What are the function of organelle in cells?

An organelle is a microscopic structure that, like an organ in the body, has one or more specific tasks to carry out within the cell.

The nucleus, which house genetic material, the mitochondria, which generate chemical energy, and the ribosomes, which put together proteins, are some of the more significant cell organelles.

All cellular organelles are composed of macromolecules such lipids, proteins, nucleic acids, and carbohydrates (DNA, RNA).

Therefore, Nucleus Ribosome Endoplasmic reticulum Golgi apparatus function is coordinated together.

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A chemical reaction produces solid sulfur as a product. Which unit should be used to describe the mass of the sulfur produced? milliliters grams kilometers kelvin

Answers

1st part: B, Grams

2nd part: A, Liters

A chemical change produces solid sulfur as a product and solids are measured  in units of grams.

What is a chemical change?

Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.

There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical changes:

1) inorganic changes

2)organic changes

3) biochemical changes

During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.

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Which type of protein will fight disease?

Answers

Answer:

Antibodies help you immune system.

Answer:

The answer is B

Explanation:

A student records the sexes and the breeds of dogs in an animal shelter. What kind of data is the student recording?

Answers

Answer:

Qualitative Data

Explanation:

Quantitative Data refers to data that can be recorded by numbers and  Qualitative data is obersvational and non-numerical

Qualitative for Apex

How does photosynthesis impact the carbon cycle and plants?

Answers

Answer:

it is a process that plants use to turn light energy and carbon into energy and as a side effect it make oxygen

The evolution from vesicles to true cells was best facilitated by the development of (2 points) a membrane separating the cell from its environment organic molecules:______.
a. such as carbohydrates and lipids self-replicating molecules,
b. such as RNA and DNA inorganic molecules,
c. such as nitrogen and oxygen

Answers

Answer:

b. such as RNA and DNA

Explanation:

DNA and RNA represent essential molecules present in all organisms. These nucleic acids (DNA and RNA) are composed of large chains of nucleotides that function to synthesize proteins required for cellular processes and to produce cell structures. Both RNA and DNA are highly stable biomolecules capable of storing and transmitting genetic information, which has been a requisite for the evolution of modern cells. Moreover, it is important to note that DNA is a double-stranded molecule and therefore it is more stable than single-stranded RNA.

Answer:

self replicating molecules, such as RNA and DNA

Explanation:

Which are superficial anatomical features? skin color arteries nerves posture

Answers

Answer:

skin color

Explanation:

Answer:

A. and D.

Explanation:

Skin color and Posture

why do you suppose that someone invented plastic

Answers

Answer: Plastics could protect the natural world from the destructive forces of human need.

Explanation: Plastic allows us to keep water in a bottle like if your going to arizona and you are dying of thrist, then you'll have water in a bottle or as we call "A water bottle". Plastic bags were invented to save the planet, according to the son of Swedish engineer Sten Gustaf Thulin who created them in 1959. The bags were developed as an alternative to paper bags, which were considered bad for the environment because they resulted in forests being chopped down.

If short hair (L) is dominant to long hair (l), then what fraction of the offspring produced by a cross of Ll x ll will have long hair

Answers

Answer:

The answer is 50%.

Explanation:

If we cross the two genotypes given in the question as Ll and ll, we can see that 50% of the offspring will have Ll as the genotype and the other 50% will have ll as the genotype.

Since L is the dominant gene, all the Ll genotypes will have long hair as a result of the dominant gene.

I hope this answer helps.

Consider that RR is red (dominant) and WW is white (dominant) plant phenotypes. The offspring of a cross between an RR plant and a WW plant would be pink and white. all pink. all white. red and pink.

Answers

Answer:

A, all Pink

Explanation:

Consider that RR is red (dominant) and WW is white (dominant) plant phenotypes. The offspring of a cross between an RR plant and a WW plant would be pink and white. Then the offspring would be pink.

What is dominant plant?

Key species that shape how an ecosystem functions are called dominants. Typically, aboveground characteristics are used to evaluate plant dominance.

Individual species, on the other hand, might not scale proportionally belowground compared to aboveground. This is crucial in ecosystems like grassy and shrubby biomes, where the majority of biomass is distributed below ground.

Dominant species are important organisms that influence how an environment works. Typically, plant dominance is assessed using aboveground traits. Individual species may not scale proportionally belowground compared to aboveground, on the other hand.

Therefore, Consider that RR is red (dominant) and WW is white (dominant) plant phenotypes. The offspring of a cross between an RR plant and a WW plant would be pink and white. Then the offspring would be pink.

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Which of the following is true about ischemic stroke? a. Often caused by emboli from the basilar arteries b. Has risk factors that include atherosclerosis c. Can be a result of a hypercoagulable state d. Results from hemorrhage into brain tissue Is associated with acute hypertension

Answers

Answer:

b. Has risk factors that include atherosclerosis

Explanation:

Ischemic stroke happens when there are underlying factors such as atherosclerosis. Atherosclerosis is caused by clogging of fat and cholesterol in the blood vessels. The reduction in the flow of blood to the brain is usually as a result of blood clumping together and blocking the blood vessels carrying blood to the brain.

The symptoms of ischemic stroke include dizziness, loss of coordination, headache etc.

What is the smallest number of nucleotides that must be added or subtracted to change the triplet grouping of the genetic message?Group of answer choices

Answers

Answer:

The correct answer is - one.

Explanation:

A triplet code or triplet grouping of the genetic message is a code that carries the genetic information and help in providing the enough information in the DNA to arrangement of all 20 amino acid. It can make 64 cobinations of genetic code by just triplet code.

Adding or subtracting the one nucleotide of the triplet code would change the genetic code or message and cause mutation or leads to different amino acid and protein.

Thus, the correct answer is- one.

Incomplete expansion or collapse of part or all of a lung due to mucus, tumor, or a foreign body that blocks the bronchus is called:_________.

Answers

Answer:

Atelectasis

Explanation:

Atelectasis is a medical ailment which affects the respiratory system. It is formed as a result of incomplete expansion or collapse of part or all of a lung due to mucus, tumor, or a foreign body that blocks the bronchus.

It is however common with people who are asthmatic other have lung diseases and it is characterized by low fever, breathing difficulty .

Hypothesis statement that includes an independent and dependent variable

Answers

Answer:

Best and easiest way is an "If, then" statement.

e.g.  If there is no rainfall, then the plants will die.

Explanation:

how do I explain science in my own words​

Answers

Answer:

you can say science is more important for my life

The wild type of allele for a gene has more pairs than the mutated form of allele what type of mutation A. a base pare of deletion B. base pair substitution C. base pair seperation D. base pair insertion

Answers

Answer:

A. a base pare of deletion

Explanation:

A base pair deletion is a mutation where one nucleotide is removed during DNA replication. The base-pair deletions produce frameshift mutations, i.e., they cause genetic modifications that alter the Open Reading Frame (ORF) of the corresponding protein. Examples of human diseases caused by deletion mutations include, among others, cystic fibrosis and Williams syndrome.

"A birth in which the baby is surgically removed from the uterus, rather than traveling through the birth canal, is called"

Answers

Answer:

Cesarean section

Explanation:

a surgical operation for delivering a child by cutting through the wall of the mother's abdomen.

What is a chromosome?
A. A strand of DNA
B. A virus that attacks cells
C. A protein used by cells
D. A type of allele

Answers

Answer:

A strand of genetic material ... is also A.P.EX approved

DNA stores the genetic code, chromosomes are thread-like structures, and sister chromatids are two halves of chromosomes and a strand of DNA. Thus, option A is correct.

What is chromosome?

The genetic code is stored in every cell of your body in the form of deoxyribonucleic acid (DNA). It makes your body's instruction manual. The DNA molecule is packaged into thread-like structures called chromosomes in each cell's nucleus.

The term "homologous chromosome" refers to chromosomes that share the same genetic foundation but may also have variants caused by replication. The two halves of a given chromosome that are held together at the centromere are called sister chromatids.

After the cell has gone through the process of DNA replication in order to get ready for cell division, chromosomes are known as "replication chromosomes" emerge.

Therefore, DNA stores the genetic code, chromosomes are thread-like structures, and sister chromatids are two halves of chromosomes and a strand of DNA. Thus, option A is correct.

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List whether the following is an example of anatomy or physiology. A. Look at the microscopic structure of a tumor. B. Measuring respiratory rate during sleep. C. Measuring blood pressure during exercise. D. Observe a lesion to see if the border is irregular.

Answers

Answer:

. A. Look at the microscopic structure of a tumor. = Anatomy

B.Measuring respiratory rate during sleep.= Physiology

C. Measuring blood pressure during exercise.  = Physiology

D. Observe a lesion to see if the border is irregular. = Anatomy

Explanation:

1. Os ancestrais das cobras possuíam membros, que desapareceram ao longo da evolução do grupo. Marque a alternativa que explica, de acordo com o lamarckismo, a ausência de patas em serpentes: * 1 ponto a. Os ancestrais das cobras adotaram hábitos rastejantes, deixando de utilizar os membros, que atrofiaram e acabaram por desaparecer nesses animais. b. Existiam variações nas características ancestrais das cobras. Os animais que não possuíam membros, foram selecionados pelo ambiente pois favoreceu o hábito rastejante.

Answers

Answer:

ced sfhhhbbbbbbbbbbbbbbbbh

Use the drop-down menus to answer questions about bacteria. Since bacteria are prokaryotes, they have no The outside of a bacterial cell is protected by a structure called a . The provides a rigid structure that gives the cell its shape. The helps to transport ions, nutrients, and waste. allow DNA to be transferred from one bacterium to another.

Answers

Answer:

See the answer below

Explanation:

Since bacteria are prokaryotes, they have no nucleus and membrane-bound organelles. The outside of a bacterial cell is protected by a structure called a capsule. The cell wall provides a rigid structure that gives the cell its shape. The cell membrane helps to transport ions, nutrients, and waste. The plasmids allow DNA to be transferred from one bacterium to another.

The bacteria are microscopic organisms that are generally classified as prokaryotes. The prokaryotes lack nucleus and other membrane-bound organelles, unlike the eukaryotes. The bacteria cells are enclosed in a protective structure known as the capsule. Immediately after the capsule is the cell wall whose components vary depending on whether the bacteria is Gram-positive or negative.

Towards the innermost part of the cell, after the cell wall is the cell membrane. It acts as a channel for the transport of materials in and out of the cell. Some bacteria cells have short, circular, extrachromosomal DNA known as plasmids which can be transferred from one cell to another.

Nucleus

Capsule

Cell wall

Cell membrane

Pili

An athlete is injured on the field. His teammates see that the injury is moderately swollen, and the athlete reports that the area is numb. What is the first thing that his teammates should do?

A.
test whether he can put weight on the area
B.
protect the athlete from further injury
C.
apply a compression wrap to the injured area
D.
ice the injured area for five minutes

Answers

B. protect the athlete from further injury.

Calculate the percentage loss of mass between the sucrose solutions 0.1 mol/dm3and 0.5 mol/dm3. Give your answer to three significant figures

Answers

Answer:

The percentage loss in mass between sucrose solutions 0.5 mol/dm³ and 0.1 mol/dm³ is 80.0% loss in mass

Explanation:

The molecular formula of sucrose is C₁₂H₂₂O₁₁

The molecular mass of sucrose is 342.3 g/mol

Therefore;

The mass of sucrose in 0.1 mol/dm³ solution = 0.1 × 342.3 = 34.23 g

The mass of sucrose in 0.5 mol/dm³ solution = 0.5 × 342.3 = 171.5 g

The percentage loss in mass of the sucrose is given as follows;

[tex]Percentage \ loss \ in \ mass = \dfrac{Original \ mass - New \ mass}{Original \ mass } \times 100[/tex]

Therefore;

[tex]Percentage \ loss \ in \ mass = \dfrac{171.5 - 34.23}{171.5} \times 100 = 80.04 \%[/tex]

Which gives, the percentage loss in mass between sucrose solutions 0.1 mol/dm³ and 0.5 mol/dm³ is 80.0% to three significant figures.

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