Answer: 1 1/2
Explanation:
The amphibian heart has a single, undivided ventricle, two atria, a sinus venosus, and a Conus arteriosus. Their sarcopterygian ancestors had hearts with all of these chambers, but the ventricle was partially divided and probably aided in separating pulmonary and systemic circulatory circuits. Check the following statements that could help us understand why amphibian evolution resulted in the loss of the partial ventricular septum.
A .The loss of the ventricular septum probably occurred because blood returning to the heart of amphibians bypasses the ventricle being shunted from the sinus venasus and right atrium directly to the pulmonary artery and lungs.
B. Loss of the partial ventricular septum reflects the fact that blood returning to the heart from the systemic circuit is often highly oxygenated because many amphibians rely on cutaneous and buccal gas exchange, as well as pulmonary gas exchange, much of the time.
C. Mixing of blood from the lungs with blood from the body in the ventricle is not a problem. Loss of the partial ventricular septum is not a problem because the spiral valve keeps systemic and pulmonary blood separate within the ventricle.
D. The Conus arteriosus of the amphibian heart receives blood from the right atrium and passes the blood on to the pulmonary circulation. This keeps oxygenated and nonoxygenated blood separate.
E. The slightly asynchronous contraction of left and right atria help keep systemic and pulmonary circuit blood separated in the ventricle.
Answer:
D. The Conus arteriosus of the amphibian heart receives blood from the right atrium and passes the blood on to the pulmonary circulation. This keeps oxygenated and nonoxygenated blood separate.
Explanation:
The conus arteriosus plays an important role in directing blood into the correct arterial arches in amphibian which keeps oxygenated and nonoxygenated blood separate from one another. The Conus arteriosus of the amphibian heart receives blood from the right atrium chamber of heart and passes the blood on to the pulmonary circulation which keeps oxygenated and nonoxygenated blood separate from each other and there is no need for partial ventricular septum.
Many desert mammals have developed a nocturnal lifestyle. This means that during the day they sleep underground in their burrows, and they come out to eat and play at night. What is a good reason for a desert fox to show this pattern of behavior?
Answer:
A good reason why a desert fox shows this pattern of behavior is to protect themselves from cold conditions since at nighttime, it gets very cold in the desert!
Explanation:
Nocturnal is a type of animal behaviour shown when the animals are active at night time and inactive at daytime. Desert fox shows this behaviour so that it can avoid the hot daytime of the desert.
What is nocturnal behaviour?Nocturnal lifestyle is the behaviour adopted by animals that are active at night time and are inactive during the daytime. During the daytime, they rest in the cool burrows, holes and underground canals to prevent the loss of water and to protect themselves from the extremely hot environment.
The desert animals like desert foxes have adapted the nocturnal lifestyle to avoid the extreme heat during the daytime and sleep in their underground burrows. Instead, they come out during the night when it is cool in deserts to eat and play.
Nocturnal lifestyle is shown by the diurnal animals that rest and sleeps in the burrows, holes and cool places during the hot time of the day.
Therefore, the desert fox shows a nocturnal lifestyle.
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how does energy drive the cycling of matter through different geological processes?
Answer:
Here is the link to answer
Explanation:
bit. ly/3a8Nt8n
A fiber reinforced composite contains e-glass fibers in an epoxy matrix. E for the glass is 72 GPa, E for the epoxy is 2.4 GPa. Find the elastic modulus of a composite that contains 5% fibers in the longitudinal direction, Ecl
Answer: hello your question is in complete below is the complete question
A fiber reinforced composite contains e-glass fibers in an epoxy matrix. E for the glass is 72 GPA, E for the epoxy is 2.4 GPa. Find the elastic modulus of a composite that contains 5% fibers in the longitudinal direction, Ecl = ViEi + EmVm? (note Vi + Vm= 1.) O 5.88 GPa O 5.66 GPa O 2.52 GPa O 6.74 GPa
answer : 5.88 GPa
Explanation:
Fiber reinforced composite containing e-glass fibers
E for the glass ( Ei ) = 72 GPa
E for the epoxy ( Em ) = 2.4 GPa
Determine the Elastic modulus of a composite containing 5% fibers
percentage of glass = 5% = Vi = 0.05
∴ percentage of epoxy = 95% ; Vm = 0.95
using the relation included in the question
Ecl = Ei Vi + Em Vm
= ( 72 * 0.05 ) + ( 2.4 * 0.95 )
= 3.6 + 2.28 = 5.88 GPa
Select an organism of your interest! Research to see if that organism undergoes asexual or sexual reproduction. Describe why that type of reproduction is advantageous for your organism.
Answer:
Many fungi and plants reproduce asexually. Some plants have specialized structures for reproduction via fragmentation.
Explanation:
This allows them to adjust to conditions in the environment. They can spread quickly through asexual reproduction when conditions are stable. They can increase their genetic variation through sexual reproduction when conditions are changing and variation may help them survive.
Reproduction is a method by which the genetic material from the parent is transferred to offspring and in this way the character and traits are passed from generations.
I will select plants for my research purpose.
Plants are species that reproduce sexually. They have male and female organs that produce cells for reproductions. They sexually reproduce through the process of pollination.
This method of reproduction helps in genetic variation and in forming recombinant species that are more variant.
This variation helps the plant species to survive better compared to less competent species.
Sexual reproduction is beneficial for plants as it increases varieties and helps plants in fighting against a common population disease.
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The method to determine if an event or object is older or younger by comparing the rock layers is called [BLANK] dating as it does not give an actual age in years.
Answer:
radiometric dating methods
There is an increased population of ground
squirrels in your town's park. How will this even affect mechanical weathering in the area?
Answer:
Explanation:
The ground squirrels will dig into the ground. This will break up rocks underground or bring the rocks to the surface, where it is exposed to other weathering forces.
1. An organism's ___ shows what alleles they have for a particular gene, while the ____ is the physical expression of the trait. A. phenotype; genotype B. genotype; phenotype C. Genotype; allele D. Trait; allele
Answer:
I believe the answer would be B
5. What are the other names and functions of ethyl alcohol?
Answer:
Ethanol, also called ethyl alcohol, grain alcohol, or alcohol, a member of a class of organic compounds that are given the general name alcohols; its molecular formula is C2H5OH.
Answer:
Ethyl alcohol is known as pure alcohol or Ethanol.
It can be used for the making of alcoholic beverages like beer and in medicine as a solvent.
nutrient deficiency symptoms of plans
Explanation:
it depends on Which nutrients the body lacks l.however,there are some general symptoms you might experience.they include l:pallor,fatigue, depression,weakness,trouble breathing,unusual food craving,hair loss, constipation,etc
Janine’s hands are larger than her father’s hands. Which explanation can account for the difference in hand size between father and daughter?
Janine’s large hands may be the result of a genetic mutation.
B
Janine inherited her mother’s hand size.
C
The difference in hand size may be due to an environmental cause.
D
Though some of the above are more likely than others, all of the above are possible explanations.
Answer:
D or b
Explanation:
Choose between those
The rest of the group agrees with your conclusion that Dr. Tamm was likely exposed to a membrane uncoupling agent. Uncoupling agents allow protons to cross the inner membrane of the mitochondria, down their concentration gradient, without passing through ATP synthase. Consider that each respiring cell has a need for a certain amount of ATP, but in the presence of a membrane uncoupling agent, the proton gradient that is generated by the ETC is being partially dissipated without any ATP being made. How do you think the activity of other metabolic pathways might change in response
Answer:
No more reactions occurs.
Explanation:
The activity of other metabolic pathways also change in response to the proton which enters mitochondria without passing through ATP synthase because ATP synthase is responsible for the production of ATP molecules from proton. If this ATP is not produced no further reactions occurs in the cell. This ATP is used by the cells in various activities so if the proton does not pass through ATP synthase then no energy in the form of ATP is present for other metabolic pathways of the cells.
Artesian springs bring pressurized groundwater to the surface through which feature of Karst topography?
streams
caves
fissures
igneous rock
Answer:
The correct answer is D) Fissures
Explanation:
Karst is a topography or landform that is created by the dissolution of soluble rocks beneath the surface by waters from the surface or below.
Fissures are formed when because of earth movements there is the occurrence of a long, narrow opening, in the earth.
Artesian springs refer to the water coming out through these cracks or openings in the earth onto the surface of the Karst topography.
Cheers
3 alternative energy sources
sun, wind, atomic energy
sun, wind , rain
coal, oil, gas
atomic energy, coal, wind
Energy from the sun assists with the water cycle by:
A. Filling oceans
B. Precipitation
C. Water evaporating on Earth
D. Clouds becoming more dense
Choose one correct answer
Answer:
C
Explanation:
The heat of the sun provides energy to make the water cycle work. The sun evaporates water from the oceans into water vapor. This invisible vapor rises into the atmosphere, where the air is colder. The colder air causes water vapor to condense into water droplets and clouds.
Please help!
We spent quite a bit of time discussion the various types of vaccines available this week, and how each of them compare and contrast with each other. However, ALL vaccines have a common purpose, regardless of how they aim to accomplish it. In YOUR OWN WORDS, tell me what that common purpose is. This is a short answer question and should be answered in a sentence or two, maybe three at the most.
Answer:
All vaccines work together to accomplish one main task and that is to prepare your body incase it gets invaded with a harmful virus that could cause you to get very sick. Vaccines are weak forms of the virus that are injected into humans so that the body can start creating the right antibodies to defend the body against the harmful virus.
I hope this helps! :)
AG CLASS
Complete the following sentence.
A science professional who studies diseases of plants is called a plant _________.
No options to choose from:(
Answer:
A botanist
Explanation:
Botanist scientist
3) Write 3 sentences that explain how limiting factors can change the carrying capacity of
an ecosystem? (hint think in terms of a food web)
Answer:
Explanation:
human activities should no be more than the capacity of ecosystem
we should pay attention to carrying capacity of eco system
another one i don't no sorry for that
hope you like my answer and hope it helps you
Two parents, both heterozygous (Tt) and tall, are
crossed to produce offspring. What are the possible
genotypes and phenotypes of the offspring?
Answer:
1:2:1 is the ratio
Explanation:
well if you draw a punnet square you will get TT Tt Tt tt
Answer:
1:2:1 is the ratio
Explanation:
answer this pleaseeeeeee
You are a consultant for a second ELVIS mission to NPIP. Describe what physical and/or chemical treatments you would require prior to liftoff to minimize the opportunity for contamination of the ELV (the landing module of the spacecraft) and ELVIS (a new version of the robot) by Earth microbes. Hint: Keep in mind the following: ELVIS’s skin cannot withstand temperatures above 90°C; the ELV itself is approximately the size of a minivan and includes many metal parts. Use scientific terminology as you discuss this answer: e.g., are you trying to achieve disinfection or sterilization? Are you recommending use of antiseptics or disinfectants?
Answer:
As the consultant for the second ELVIS mission, my recommendations would be as follows:
Provision of standardized materials to the best of my knowledge and practice.Production and Development of look-alike skin from the variant of Lycra.Instruction of proper exercises such that the overall effect is minimized.Explanation:
In order to provide the necessary care in the limitations of the mission, the first step is to use the first mission of ELVIS as the starting point. The steps, precautions and lessons learnt from the first mission are used as stepping stones for the second mission.
Which role do ultrafine particles play in dirty air?
They contribute to less than 13,000 premature deaths a year.
They can worsen symptoms for people with breathing difficulties.
They are easily removed from the air when people see them floating.
They are constantly filtered by the nose, which prevents lung absorption
Answer:
B
Explanation:
The role the ultrafine particles play in dirty air is that they can worsen symptoms for people with breathing difficulties. The correct answer is b).
What are ultrafine particles?The term "ultrafine particles" (UFPs) refers to particles with a dimension of less than micrometers and more than 0.1 micrometres (100 nanometers), also known as nanoscale particles. The majority of the ultrafine particles are found on motorways and are mostly produced by vehicle emissions.
It has been demonstrated that ultrafine pollution particles may play a crucial role in igniting extra pathways or inflammation, which worsens asthma disease. The ultrafine particles released by motor vehicles and other sources of combustion are covered with an organic chemical coating that can be inhaled.
By oxidizing cells and tissues, these substances create free oxygen radicals that activate the immune system in the lung. For those who have asthma, oxidation exacerbates the allergic inflammation in their lungs.
Therefore the correct option is b).
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Below are the ingredients of photosynthesis. Organize them to show what is used and what is produced
during this process.
carbon dioxide
water
oxygen
glucose
sunlight
_____plus_____in the presence of_____result in_____plus_____
24
An octopus reproduces only once in its life, but it may have more than 100,000 offspring, depending on the species. Certain
species of penguin, by contrast, have only one chick at a time.
If some species can reproduce as rapidly as the octopus (100,000
offspring every 3 or 4 years), how is it possible that a species that has only one young at a time is equally successful?
Answer:
The success of a species depends on the number of offspring that survive long enough to reproduce.
Explanation:
Study Island
PLEASE HELP!!!!!! :)
Answer:
C
Explanation:
How do the baby's respiration and circulation change when the baby is born? O A. The baby's blood has oxygen for the first time. B. The baby now breathes oxygen instead of carbon dioxide. C. It no longer depends on the mother for oxygen. D. The circulatory system pumps blood for the first time.
During pregnancy, the baby grows and depends on mother for food, nutrition, oxygen, etc. the baby's respiration and circulation change when the baby is born as it no longer depends on the mother for oxygen, i.e., option C.
What is the way of oxygen transport from mother to child during pregnancy?As the fetus is connected by the umbilical cord to the placenta, the organ will develops and implants in the womb during pregnancy.
Through umbilical cord having blood vessels, the baby will receives all the necessary nutrition, oxygen, and life support from the mother with the help of the placenta.
As the baby comes out, it will no longer depend on the mother for oxygen.
Thus, the correct option is C.
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what are two different events that occur during metaphase?
Answer:
The next two major events that take place in mitosis are the alignment of chromosomes at the center of the cell and the subsequent separation of sister chromatids to opposite mitotic spindle poles. These two events occur in metaphase and anaphase, respectively.
Explanation:
Someone help me please :)
APC is a tumor suppressor and acts in the Wnt signaling pathway to prevent the TCF complex from turning on Wnt-responsive genes. Mice that lack the gene encoding TCF4 do not have the ability to maintain the pool of proliferating gut stem cells needed to renew the gut lining. What do you predict will happen in mice that lack the APC gene
Answer:
As APC is indicated as a tumor suppressor, lack of APC would lead to tumor development in the mutated mice.
Explanation:
The wnt signaling pathway plays an important role in controlling stem cell proliferation. Stem cells are present in the gut and other locations where they are required to be replenished after short intervals. In the gut, the gut epithelial is exposed to a very tough environment i.e. digestive acids. Thus it is replenished where the new stem cells originate from underlying stem cells.
Axin binding is the major component of this process. However, the unaffected axin leads to binding with a component termed TCF. TCF4 genes include cell cycle factors (such as myc) that encourage cell regeneration.
When the ligand is absent and APC is present, the axin bound with APC to form a team that directs and controls the cell regeneration.
Thus, if APC is not expressed in a cell, beta-catenin in the axin is available to bind to TCF inducing wnt response element genes that stimulate cell proliferation.
The result in tissue level is an enhanced rate of cell growth which leads to tumor.
Which type of heat transfer takes place when objects touch each other?
WILL MARK BRAINLIEST 27 POINTS
Answer:
conduction
Explanation: